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关注:1
2013-05-23 12:21
求翻译:The filters are replaced according to their life and differential pressure. There are two purify lines in the ventilation system, one of which is under operation and the other is on standby.是什么意思?![]() ![]() The filters are replaced according to their life and differential pressure. There are two purify lines in the ventilation system, one of which is under operation and the other is on standby.
问题补充: |
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