GB/T 19520.19-2020
Mechanical structures for electronic equipment—Dimensions of mechanical structures of the 482.6 mm (19 in) series—Part 3-107: Dimensions of subracks and plug-in units, small form factor 电子设备机械结构 482.6 mm(19 in)系列机械结构尺寸 第3-107部分:小型化插箱和插件的尺寸 |
GB/T 20801.3-2020
Pressure pipng code—Industrial piping—Part 3:Design and calculation 压力管道规范 工业管道 第3部分:设计和计算 |
GB/T 14098-2020
Turbines and turbine sets—Measurement of emitted airborne noise—Engineering/survey method 燃气轮机和燃气轮机机组 气载噪声的测量 工程法/简易法 |
GB/T 17888.1-2020
Safety of machinery—Permanent means of access to machinery—Part 1: Choice of fixed means and general requirements of access 机械安全 接近机械的固定设施 第1部分:固定设施的选择及接近的一般要求 |
GB/T 19066.2-2020
Composite wave-serrated metal gaskets for pipe flanges一Part 2:Class designated 管法兰用金属波齿复合垫片 第2部分:Class系列 |
GB/T 17888.4-2020
Safety of machinery—Permanent means of access to machinery—Part 4: Fixed ladders 机械安全 接近机械的固定设施 第4部分:固定式直梯 |
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