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GB standards are the China national standards; Prefix code GB are Mandatory standards, GB/T are Recommended standards; All products or service must be compliance with GB standards; If you want to export products or services to huge Chinese market, need ensure they are meet the requirements of GB china national standards; We provide Chinese GB standards and English version GB standards Lookup, Translate, Download, Imported Commodity GB standards Testing and Compliance review services. |
| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB 15208.3-2018 |
Micro-dose X-ray security inspection system—Part 3:TransmisSiOn cargo security inspection system 微剂量X射线安全检查设备-第3部分：透射式货物安全检查设备 |
China National Standards SiO |
 English PDF |
| GB 15208.2-2018 |
Micro-dose X-ray security inspection system—Part 2:TransmisSiOn baggage security inspection system 微剂量X射线安全检查设备-第2部分：透射式行包安全检查设备 |
China National Standards SiO |
English PDF |
| GB/T 34691.1-2018 |
Plastics—Thermoplastic polyester (TP) moulding and extruSiOn materials—Part 1:Designation system and basis for specifications 塑料-热塑性聚酯（TP）模塑和挤出材料-第1部分：命名系统和分类基础 |
China National Standards SiO |
English PDF |
| GB/T 37195-2018 |
Technical specification for rehabilitation of pipeline corroSiOn prevention with resin 以树脂为基料管道耐蚀修复作业技术规范 |
China National Standards SiO |
English PDF |
| GB/T 37187-2018 |
Technology requirement of the anti-corroSiOn materials for desulfurization chimneys 脱硫烟囱用防腐蚀材料技术要求 |
China National Standards SiO |
English PDF |
| GB/T 37179-2018 |
Evaluation specification of anticorroSiOn engineering quality for desulfurization chimney 脱硫烟囱防腐蚀工程质量评定规范 |
China National Standards SiO |
English PDF |
| GB/T 37199.2-2018 |
Plastics—Polybutene(PB) moulding and extruSiOn materials—Part 2：Preparation of test specimens and determination of properties 塑料-聚丁烯（PB）模塑和挤出材料-第2部分：试样制备和性能测定 |
China National Standards SiO |
English PDF |
| GB/T 37194.2-2018 |
Plastics—Poly(phenylene sulfide)(PPS) moulding and extruSiOn materials—Part 2:Preparation of test specimens and determination of properties 塑料-聚苯硫醚(PPS)模塑和挤出材料-第2部分:试样制备和性能测定 |
China National Standards SiO |
English PDF |
| GB/T 37194.1-2018 |
Plastics—Poly(phenylene sulfide)(PPS) moulding and extruSiOn materials—Part 1:Designation system and basis for specifications 塑料-聚苯硫醚(PPS)模塑和挤出材料-第1部分:命名系统和分类基础 |
China National Standards SiO |
English PDF |
| GB/T 8656-2018 |
EmulSiOn-and solution-polymerized styrene-butadiene rubber(SBR)—Evaluation procedures 乳液和溶液聚合型苯乙烯-丁二烯橡胶（SBR）-评价方法 |
China National Standards SiO |
English PDF |
| GB/T 37182-2018 |
Gas analysis—Gas chromatograph with plasma emisSiOn detector 气体分析-等离子发射气相色谱法 |
China National Standards SiO |
English PDF |
| GB/T 37184-2018 |
CorroSiOn control engineering life cycle of nuclear power plants—General requirements 核电厂腐蚀控制工程全生命周期-通用要求 |
China National Standards SiO |
English PDF |
| GB/T 37249-2018 |
Calculation method of sulphur dioxide emisSiOn with portland cement clinker production 硅酸盐水泥熟料生产中二氧化硫排放量计算方法 |
China National Standards SiO |
English PDF |
| GB/T 37213-2018 |
Test method for silicon brick dimenSiOn—Laser technology method 硅晶锭尺寸的测定-激光法 |
China National Standards SiO |
English PDF |
| GB/T 37190-2018 |
Pipeline corroSiOn control engineering life cycle—General requirements 管道腐蚀控制工程全生命周期-通用要求 |
China National Standards SiO |
English PDF |
| GB/T 37248-2018 |
High purity aluminium oxide—Determination of trace metal elements—Inductively coupled plasma optical emisSiOn spectrometry 高纯氧化铝-痕量金属元素的测定-电感耦合等离子体发射光谱法 |
China National Standards SiO |
English PDF |
| GB/T 37181-2018 |
Reinforced concrete corroSiOn control engineering life cycle—General requirements 钢筋混凝土腐蚀控制工程全生命周期-通用要求 |
China National Standards SiO |
English PDF |
| GB/T 37183-2018 |
CorroSiOn control engineering life cycle—Risk assessment 腐蚀控制工程全生命周期-风险评价 |
China National Standards SiO |
English PDF |
| GB/T 5761-2018 |
SuspenSiOn polyvinyl chloride resins of general purpose 悬浮法通用型聚氯乙烯树脂 |
China National Standards SiO |
English PDF |
| GB/T 2980-2018 |
Size designation，dimenSiOns,inflation pressure and load capacity for earth-mover tyres 工程机械轮胎规格、尺寸、气压与负荷 |
China National Standards SiO |
English PDF |
| GB/T 30544.13-2018 |
Nanotechnologies — Vocabulary — Part 13:Graphene and related two-dimenSiOnal (2D) materials 纳米科技-术语-第13部分：石墨烯及相关二维材料 |
China National Standards SiO |
English PDF |
| GB/T 13477.12-2018 |
Test method for building sealants－Part 12：Determination of adheSiOn/cohesion properties at constant temperature 建筑密封材料试验方法-第12部分：同一温度下拉伸-压缩循环后粘结性的测定 |
China National Standards SiO |
English PDF |
| GB/T 51281-2018 |
Synchronous Digital Hierarchy (SDH) Optical Fiber TransmisSiOn System Engineering Acceptance Criteria 同步数字体系（SDH）光纤传输系统工程验收标准 |
China National Standards SiO |
English PDF |
| GB 3552-2018 |
Ship water pollutant emisSiOn control standard 船舶水污染物排放控制标准 |
China National Standards SiO |
English PDF |
| GB/T 37151-2018 |
Specifications for remote sensing image product based on the national topographic maps subdiviSiOns 基于地形图标准分幅的遥感影像产品规范 |
China National Standards SiO |
English PDF |
| GB/T 37098-2018 |
Rating requirements for knowledge diffuSiOn competence of innovation method 创新方法知识扩散能力等级划分要求 |
China National Standards SiO |
English PDF |
| GB/T 17248.2-2018 |
Acoustics—Noise emitted by machinery and equipment—Determination of emisSiOn sound pressure levels at a work station and at other specified positions in an essentially free field over a reflecting plane with negligible environmental corrections 声学-机器和设备发射的噪声-在一个反射面上方可忽略环境修正的近似自由场测定工作位置和其他指定位置的发射声压级 |
China National Standards SiO |
English PDF |
| GB/T 17248.3-2018 |
Acoustics—Noise emitted by machinery and equipment—Determination of emisSiOn sound pressure levels at a work station and at other specified positions applying approximate environmental corrections 声学-机器和设备发射的噪声-采用近似环境修正测定工作位置和其他指定位置的发射声压级 |
China National Standards SiO |
English PDF |
| GB/T 17248.5-2018 |
Acoustics—Noise emitted by machinery and equipment—Determination of emisSiOn sound pressure levels at a work station and at other specified positions applying accurate environmental corrections 声学-机器和设备发射的噪声-采用准确环境修正测定工作位置和其他指定位置的发射声压级 |
China National Standards SiO |
English PDF |
| GB/T 9465-2018E |
Aerial work vehicle (English verSiOn) 高空作业车(英文版) |
China National Standards SiO |
English PDF |
| GB/T 36234-2018 |
Qualification testing of welders for fuSiOn welding ontitanium and titanium alloys，zirconium and zirconium alloys 钛及钛合金、锆及锆合金熔化焊焊工技能评定 |
China National Standards SiO |
English PDF |
| GB/T 36214.5-2018 |
Plastics—Determination of average molecular mass and molecular mass distribution of polymers using size-excluSiOn chromatography—Part5:Method using light-scattering detection 塑料 体积排除色谱法测定聚合物的平均分子量和分子量分布 第5部分：光散射法 |
China National Standards SiO |
English PDF |
| GB/T 36216-2018 |
Ships and marine technology—Ship recycling management systems—Measures to prevent asbestos emisSiOn and exposure during ship recycling 船舶与海上技术 拆船管理体系 拆船过程中防止石棉发散和暴露的措施 |
China National Standards SiO |
English PDF |
| GB/T 19292.2-2018 |
CorroSiOn of metals and alloys—Corrosivity of atmospheres—Part 2: Guiding values for the corrosivity categories 金属和合金的腐蚀 大气腐蚀性 第2部分：腐蚀等级的指导值 |
China National Standards SiO |
English PDF |
| GB/T 19292.1-2018 |
CorroSiOn of metals and alloys—Corrosivity of atmospheres—Part 1: Classification, determination and estimation 金属和合金的腐蚀 大气腐蚀性 第1部分：分类、测定和评估 |
China National Standards SiO |
English PDF |
| GB/T 36208-2018 |
AnticorroSiOn lining technical requirements and procedure evaluation for industrial exhaust gas systems 工业烟气排放系统防腐衬里技术要求及评价方法 |
China National Standards SiO |
English PDF |
| GB/T 36214.4-2018 |
Plastics—Determination of average molecular mass and molecular mass distribution of polymers using size-excluSiOn chromatography—Part4:High-temperature method 塑料 体积排除色谱法测定聚合物的平均分子量和分子量分布 第4部分：高温法 |
China National Standards SiO |
English PDF |
| GB/T 36214.2-2018 |
Plastics—Determination of average molecular mass and molecular mass distribution of polymers using size-excluSiOn chromatography—Part 2:Universal calibration method 塑料 体积排除色谱法测定聚合物的平均分子量和分子量分布 第2部分：普适校正法 |
China National Standards SiO |
English PDF |
| GB/T 36214.3-2018 |
Plastics—Determination of average molecular mass and molecular mass distribution of polymers using size-excluSiOn chromatography—Part 3:Low-temperature method 塑料 体积排除色谱法测定聚合物的平均分子量和分子量分布 第3部分：低温法 |
China National Standards SiO |
English PDF |
| GB/T 36214.1-2018 |
Plastics—Determination of average molecular mass and molecular mass distribution of polymers using size-excluSiOn chromatography—Part 1:General principles 塑料 体积排除色谱法测定聚合物的平均分子量和分子量分布 第1部分：通则 |
China National Standards SiO |
English PDF |
| GB/T 24338.5-2018 |
Railway applications—Electromagnetic compatibility—Part 4: EmisSiOn and immunity of the signalling and telecommunications apparatus 轨道交通 电磁兼容 第4部分：信号和通信设备的发射与抗扰度 |
China National Standards SiO |
English PDF |
| GB/T 27420-2018 |
Conformity assessment—Application guide for evaluation and expresSiOn of uncertainty in biological sample measurement 合格评定 生物样本测量不确定度评定与表示应用指南 |
China National Standards SiO |
English PDF |
| GB/T 12760-2018 |
Cylindrical worm and wormwheel information of the dimenSiOnal data to be givem on the drawing 圆柱蜗杆、蜗轮图样上应注明的尺寸数据 |
China National Standards SiO |
English PDF |
| GB/T 15054.1-2018 |
Miniature screw threads—Part 1：Profiles, general plan and basic dimenSiOns 小螺纹 第1部分：牙型、系列和基本尺寸 |
China National Standards SiO |
English PDF |
| GB/T 35078-2018 |
High speed preciSiOn hot upsetting forgings—General specification 高速精密热镦锻件 通用技术条件 |
China National Standards SiO |
English PDF |
| GB/T 35079-2018 |
Multi-way preciSiOn die forgings—Technological design principle 多向精密模锻件 工艺编制原则 |
China National Standards SiO |
English PDF |
| GB/T 6609.1-2018 |
Chemical analysis methods and determination of physical performance of alumina—Part 1：Determination of trace elements content—Inductively coupled plasma atomic emisSiOn spectrometry method 氧化铝化学分析方法和物理性能测定方法 第1部分：微量元素含量的测定 电感耦合等离子体原子发射光谱法 |
China National Standards SiO |
English PDF |
| GB/T 27419-2018 |
Guide to the evaluation and expresSiOn of uncertainty in measurement—Supplement 1: Propagation of distributions using a Monte Carlo method 测量不确定度评定和表示 补充文件1: 基于蒙特卡洛方法的分布传播 |
China National Standards SiO |
English PDF |
| GB/T 35082-2018 |
Steel cold extruSiOn part—Technical specification 钢质冷挤压件 工艺规范 |
China National Standards SiO |
English PDF |
| GB/T 35087-2018 |
Plain bearings—Lubrication holes, grooves and pockets—DimenSiOns, types, designation and their application to bearing bushes 滑动轴承 轴套润滑油孔、油槽和油穴 尺寸、型式、标记及其应用 |
China National Standards SiO |
English PDF |
| GB/T 35089-2018 |
PreciSiOn gear transmission for robot—Test method 机器人用精密齿轮传动装置 试验方法 |
China National Standards SiO |
English PDF |
| GB/T 19746-2018 |
CorroSiOn of metals and alloys—Alternate immersion test in salt solution 金属和合金的腐蚀 盐溶液周浸试验 |
China National Standards SiO |
English PDF |
| GB 4343.1-2018 |
Electromagnetic compatibility requirements for household appliances,electric tools and similar apparatus—Part 1: EmisSiOn 家用电器、电动工具和类似器具的电磁兼容要求 第1部分：发射 |
China National Standards SiO |
English PDF |
| GB/T 35098-2018 |
Microbeam analysis—TransmisSiOn electron microscopy—Morphological identification method of plant viruses by transmission electron microscopy 微束分析 透射电子显微术 植物病毒形态学的透射电子显微镜鉴定方法 |
China National Standards SiO |
English PDF |
| GB/T 35054-2018 |
Process performance test method and deciSiOn rule for coal separating in heavy medium cyclones 选煤用重介质旋流器工艺性能试验方法及判定规则 |
China National Standards SiO |
English PDF |
| GB/T 35067-2018 |
CorroSiOn resistant alloy bimetal bends for petroleum and natural gas industries 石油天然气工业用耐腐蚀合金复合弯管 |
China National Standards SiO |
English PDF |
| GB/T 35072-2018 |
CorroSiOn resistant alloy bimetal fittings for petroleum and natural gas industries 石油天然气工业用耐腐蚀合金复合管件 |
China National Standards SiO |
English PDF |
| GB/T 24338.6-2018 |
Railway applications—Electromagnetic compatibility—Part 5: EmisSiOn and immunity of fixed power supply apparatus and systems 轨道交通 电磁兼容 第5部分：地面供电设备和系统的发射与抗扰度 |
China National Standards SiO |
English PDF |
| GB/T 35840.3-2018 |
Steels for plastic mould—Part 3：CorroSiOn resistant steels 塑料模具钢 第3部分:耐腐蚀钢 |
China National Standards SiO |
English PDF |
| GB/T 223.82-2018 |
Steel and iron—Determination of hydrogen content—Thermal conductivity/infrared method after fuSiOn under inert gas 钢铁 氢含量的测定 惰性气体熔融-热导或红外法 |
China National Standards SiO |
English PDF |
| GB/T 35052-2018 |
Magnetite content measurement method for heavy medium suspenSiOn used in heavy medium cyclones in coal preparation plant 选煤厂重介质旋流器悬浮液中磁性物含量的测定方法 |
China National Standards SiO |
English PDF |
| GB/T 35060.2-2018 |
General specification of shearer—Part 2: Cutting transmisSiOn unit 滚筒采煤机通用技术条件 第2部分：截割传动装置 |
China National Standards SiO |
English PDF |
| GB/T 16825.2-2018 |
Verification of static uniaxial testing machines—Part 2: TenSiOn creep testing machines—Verification of the applied force 静力单轴试验机的检验 第2部分：拉力蠕变试验机 施加力的检验 |
China National Standards SiO |
English PDF |
| GB/T 15970.1-2018 |
CorroSiOn of metals and alloys—Stress corrosion testing—Part 1: General guidance on testing procedures 金属和合金的腐蚀 应力腐蚀试验 第1部分：试验方法总则 |
China National Standards SiO |
English PDF |
| GB/T 20975.27-2018 |
Methods for chemical analysis of aluminium and aluminium alloys—Part 27：Determination of cerium,lanthanum,scandium—Inductively coupled plasma atomic emisSiOn spectrometry method 铝及铝合金化学分析方法 第27部分：铈、镧、钪含量的测定 电感耦合等离子体原子发射光谱法 |
China National Standards SiO |
English PDF |
| GB/T 19292.4-2018 |
CorroSiOn of metals and alloys—Corrosivity of atmospheres—Part 4: Determination of corrosion rate of standard specimens for the evaluation of corrosivity 金属和合金的腐蚀 大气腐蚀性 第4部分：用于评估腐蚀性的标准试样的腐蚀速率的测定 |
China National Standards SiO |
English PDF |
| GB/T 19292.3-2018 |
CorroSiOn of metals and alloys—Corrosivity of atmospheres—Part 3: Measurement of environmental parameters affecting corrosivity of atmospheres 金属和合金的腐蚀 大气腐蚀性 第3部分：影响大气腐蚀性环境参数的测量 |
China National Standards SiO |
English PDF |
| GB/T 36174-2018 |
CorroSiOn of metals and alloys—Determination of resistance to intergranular corrosion of solution heat-treatable aluminium alloys 金属和合金的腐蚀 固溶热处理铝合金的耐晶间腐蚀性的测定 |
China National Standards SiO |
English PDF |
| GB/T 15711-2018 |
Inspection of non-metallic incluSiOns of steel—Etching test method of tower samples 钢中非金属夹杂物的检验 塔形发纹酸浸法 |
China National Standards SiO |
English PDF |
| GB/T 36244-2018 |
Inductively coupled plasma atomic emisSiOn spectrometer 电感耦合等离子体原子发射光谱仪 |
China National Standards SiO |
English PDF |
| GB/T 36460-2018 |
Information technology—Biometrics—Multimodal and other multibiometric fuSiOn 信息技术 生物特征识别 多模态及其他多生物特征融合 |
China National Standards SiO |
English PDF |
| GB/T 36341.3-2018 |
Information technology—Information presentation of shape modeling—Part 3: Streaming transmisSiOn 信息技术 形状建模信息表示 第3部分：流式传输 |
China National Standards SiO |
English PDF |
| GB/T 9756-2018 |
Synthetic resin emulSiOn coatings for interior wall 合成树脂乳液内墙涂料 |
China National Standards SiO |
English PDF |
| GB/T 36242-2018 |
Volume converSiOn device for gas meter 燃气流量计体积修正仪 |
China National Standards SiO |
English PDF |
| GB/T 36241-2018 |
Vortex precesSiOn flowmeters for gas 气体旋进旋涡流量计 |
China National Standards SiO |
English PDF |
| GB/T 36374.1-2018 |
Plastics-Sulfone polymer moulding and extruSiOn materials—Part1:Designation system and basis for specifications 塑料 砜聚合物模塑和挤出材料 第1部分：命名系统和分类基础 |
China National Standards SiO |
English PDF |
| GB/T 36375-2018 |
Railway transportation—Primary rubber spring suspenSiOn—General technical requirement 轨道交通 一系橡胶弹簧 通用技术条件 |
China National Standards SiO |
English PDF |
| GB/T 36374.2-2018 |
Plastics—Sulfone polymer moulding and extruSiOn materials—Part2:Preparation of test specimens and determination of properties 塑料 砜聚合物模塑和挤出材料 第2部分：试样制备和性能测定 |
China National Standards SiO |
English PDF |
| GB/T 36491-2018 |
PreciSiOn cycloidal pin planetary gear transmission for robot—General technical requirements 机器人用摆线针轮行星齿轮传动装置 通用技术条件 |
China National Standards SiO |
English PDF |
| GB/T 36483-2018 |
Main cable paralleled wire strands for suspenSiOn bridge 悬索桥用主缆平行钢丝索股 |
China National Standards SiO |
English PDF |
| GB/T 36546-2018 |
IntruSiOn and hold-up systems—Technical requirements for warning devices 入侵和紧急报警系统 告警装置技术要求 |
China National Standards SiO |
English PDF |
| GB/T 2694-2018 |
Specification of manufacturing for transmisSiOn line tower 输电线路铁塔制造技术条件 |
China National Standards SiO |
English PDF |
| GB/T 3367.4-2018 |
Glossary of terms for diesel locomotive—Part 4:Hydraulic transmisSiOn system 内燃机车词汇 第4部分：液力传动系统 |
China National Standards SiO |
English PDF |
| GB/T 36524-2018 |
Tools for pressing—CompresSiOn springs with rectangular section—Housing dimensions and colour coding 冲模 矩形截面压缩弹簧 安装尺寸和颜色标识 |
China National Standards SiO |
English PDF |
| GB/T 24842-2018 |
Overvoltage and insulation coordination of 1000kV UHV AC transmisSiOn project 1000kV特高压交流输变电工程过电压和绝缘配合 |
China National Standards SiO |
English PDF |
| GB/T 36485.2-2018 |
Tool holders with rectangular shank for indexable inserts—Part 2: Arbor dimenSiOn 装可转位刀片的矩形柄刀杆 第2部分：刀杆尺寸 |
China National Standards SiO |
English PDF |
| GB/T 36485.1-2018 |
Tool holders with rectangular shank for indexable inserts—Part 1:General survey, correlation and determination of dimenSiOns 装可转位刀片的矩形柄刀杆 第1部分：概述、关联性和尺寸的确定 |
China National Standards SiO |
English PDF |
| GB/T 36559-2018 |
Thyristor valves for HVDC transmisSiOn 高压直流输电用晶闸管阀 |
China National Standards SiO |
English PDF |
| GB/T 24338.2-2018 |
Railway applications—Electromagnetic compatibility—Part 2: EmisSiOn of the whole railway system to the outside world 轨道交通 电磁兼容 第2部分：整个轨道系统对外界的发射 |
China National Standards SiO |
English PDF |
| GB/T 7813-2018 |
Rolling bearings－Split type plummer block housings－Boundary dimenSiOns 滚动轴承 剖分立式轴承座 外形尺寸 |
China National Standards SiO |
English PDF |
| GB/T 273.2-2018 |
Rolling bearings—Boundary dimenSiOns，general plan—Part 2：Thrust bearings 滚动轴承 外形尺寸总方案 第2部分：推力轴承 |
China National Standards SiO |
English PDF |
| GB/T 25102.12-2018 |
Electroacoustics—Hearing aids—Part 12: DimenSiOns of electrical connector systems 电声学 助听器 第12部分：电连接器系统的尺寸 |
China National Standards SiO |
English PDF |
| GB/T 36520.2-2018 |
Hydraulic fluid power—DimenSiOns and tolerances of polyurethane seals—Part 2：Dimensions and tolerances of seals used in hydraulic reciprocating applications for piston rod 液压传动 聚氨酯密封件尺寸系列 第2部分：活塞杆往复运动密封圈的尺寸和公差 |
China National Standards SiO |
English PDF |
| GB/T 36520.1-2018 |
Hydraulic fluid power—DimenSiOns and tolerances of polyurethane seals—Part 1：Dimensions and tolerances of seals used in hydraulic reciprocating applications for piston 液压传动 聚氨酯密封件尺寸系列 第1部分：活塞往复运动密封圈的尺寸和公差 |
China National Standards SiO |
English PDF |
| GB/T 36668.2-2018 |
Condition monitoring and fault diagnostics of amusement device—Part 2: Acoustic emisSiOn monitoring method 游乐设施状态监测与故障诊断 第2部分：声发射监测方法 |
China National Standards SiO |
English PDF |
| GB/T 18844.2-2018 |
Plain bearings—Type, appearance and characterization，causes of damage to metallic hydrodynamic bearings—Part 2: Cavation eroSiOn and its countermeasures 滑动轴承 液体动压金属轴承损坏类型、外观特征和原因分析 第2部分：气蚀及对策 |
China National Standards SiO |
English PDF |
| GB/T 36746-2018 |
Rank diviSiOn of services for internet service business site 互联网上网服务营业场所服务等级评定 |
China National Standards SiO |
English PDF |
| GB/T 36723-2018 |
Grading of social art level-ProfesSiOnal classification requirements 社会艺术水平考级 专业分类要求 |
China National Standards SiO |
English PDF |
| GB/T 36794-2018 |
Determination of shear adheSiOn failure temperature of adhesive tape 胶粘带剪切破坏温度的测定 |
China National Standards SiO |
English PDF |
| GB/T 36677-2018 |
Determination of fine particle emisSiOn rates from copying (including multi-function) devices 复印（包括多功能）设备细颗粒物排放量的测定方法 |
China National Standards SiO |
English PDF |
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