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关注：1
2013-05-23 12:21
求翻译：常闭式紧急切断阀是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
常闭式紧急切断阀
问题补充： |
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2013-05-23 12:21:38
Emergency shut-off valve normally closed
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2013-05-23 12:23:18
Often closed-type emergency isolation valves
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2013-05-23 12:24:58
Often closed urgent trip valve
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2013-05-23 12:26:38
Normally closed type emergency cut-off valve
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2013-05-23 12:28:18
Emergency shut-off valve normally closed
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