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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 20969.4-2021 |
Special environmental condition—Machinery for plateau—Part 4:Guide rule of test for plateau natural environment—Internal combustion engines 特殊环境条件 高原机械 第4部分：高原自然环境试验导则 内燃动力机械 |
China National Standards 4:Guide |
 English PDF |
| GB/T 1094.4-2005 |
Power transformers-Part 4:Guide to the lightning impulse and switching impulse testing-Power transformers and reactors 电力变压器 第4部分：电力变压器和电抗器的雷电冲击和操作冲击试验导则 |
China National Standards 4:Guide |
English PDF |
| GB/T 17175.4-1997 |
Information technology--Open systems interconnection--Structure of management information--Part 4:Guidelines for the definition of managed objects 信息技术 开放系统互连 管理信息结构 第4部分:被管客体的定义指南 |
China National Standards 4:Guide |
English PDF |
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