![]() General specification for 4MHz (960ch) carrier systems on standardized 1.2/4.4 mm coaxial cable pairs 标准1.2/4.4 mm同轴线对上4 MHz (960路)载波通信系统总技术要求 |
![]() General specification for 8MHz (1800ch) carrier systems on standardized 2.6/9.5mm coaxialcable pairs 标准2.6/9.5 mm 同轴线对上8 MHz (1800路) 载波通信系统总技术要求 |
![]() Water quality--Determination of TOC by nondispersive infrared absorption method 水质 总有机碳(TOC) 的测定 非色散红外线吸收法 |
![]() Specification for 12-channel telephone carrier terminal equipment used on the symmetric pains of 2.6/9.5 mm coaxial cable 2.6/9.5 mm综合中同轴电缆高频四芯组或高频线对12路载波电话终端设备技术条件 |
![]() Blank detail specification of gas discharge tubes for overvoltage protection 过电压保护气体放电管空白详细规范 (可供认证用) |
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