定期运转：在阀门的动作很稀少时，可以定期驱动机器，检查有无异常。
Regular operation: When the valve works infrequently, it should drive the machine regularly, checking abnormality or not.
定期运转：在阀门的动作很稀少时，可以定期驱动机器，检查有无异常。
Regular operation: When the valve works infrequently, it should drive the machine regularly, checking abnormality or not.
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