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关注:1
2013-05-23 12:21
求翻译:Threaded and socket-welding openings shall be closed with plastic or metal protectors to exclude dirt and other foreign matter from the interior of the valves.是什么意思?![]() ![]() Threaded and socket-welding openings shall be closed with plastic or metal protectors to exclude dirt and other foreign matter from the interior of the valves.
问题补充: |
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