第一部分 翻译

1)Equipment in an individual station varies in both size and type, depending on the volume of fluid being handled and its properties, the size of the pipeline system, the type of monitoring and control used, the remoteness of the station, the environment, and other factors.

2)Control equipment at pump station also includes shutdown systems that automatically cause individual pump (or the entire) to be shut down if conditions exceed operating limits.

3)Cavitation causes excessive vibration, reduced pump efficiency, and in some cases failure of pump components.

第二部分 听力

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第三部分

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