以下为句子列表：
英文: Insensitive to excess-pressure (caused by a blocked discharge pipe, for instance) provided by an incorporated excess-pressure safety valve in the hydraulic oil reservoir.
中文: 泵不会超压（如在出口管路堵塞的情况下），因为在液压油池中装有超压安全阀。
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英文: Over the past 30 years, the U.S. has substantially reduced industrial and chemical pollution from point sources (i.e., a clearly identifiable source, such as a discharge pipe or conduit).
中文: 描述:在过去的30多年来，美国显著地降低了工业和化学的点源污染，点源即可清楚确定的源头，如排水管道等。
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英文: The spring-loaded excess-pressure safety valve protects the pump as well as the gearbox from overload which may arise from an erroneously closed sluice valve or alternatively due to a blocked discharge pipe etc.
中文: 弹簧超压安全阀对泵及齿轮箱起着保护作用，使其避免由于出口阀门的误关或管道的堵塞而引起的超载。
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