Close manual valve 5 and check if manual valve 6 over the bypass with FO50242 is closed too.

关闭手阀5，同时检查并确认FO50242的旁路上的手阀6也是关闭的。

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Close manual valve 5 and check if manual valve 6 over the bypass with FO50242 is closed too.

关闭手阀5，同时检查并确认FO50242的旁路上的手阀6也是关闭的。

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