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关注：1
2013-05-23 12:21
求翻译：N.C. contacts shall close 10 milliseconds after the opening of the main circuit breaker contacts and open at least 10 milliseconds before the making of the main contacts.是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
N.C. contacts shall close 10 milliseconds after the opening of the main circuit breaker contacts and open at least 10 milliseconds before the making of the main contacts.
问题补充： |
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