名词
中文翻译：主阀和闸板阀
同义词：
['Master valve', 'Block valve例句：1. The master and block valves are responsible for controlling the flow of oil through the engine.（主阀和闸板阀负责控制机油通过发动机的流动。）2. The engineer replaced the master and block valves with new ones to improve efficiency.（工程师用新的主阀和闸板阀替换了旧的，以提高效率。）3. During maintenance', 'the master and block valves were inspected for any signs of wear or damage.（维护期间，主阀和闸板阀被检查是否有磨损或损坏的迹象。）']
例句：
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1. The master and block valves are responsible for controlling the flow of oil through the engine.
主阀和闸板阀负责控制机油通过发动机的流动。
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2. The engineer replaced the master and block valves with new ones to improve efficiency.
工程师用新的主阀和闸板阀替换了旧的，以提高效率。
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3. During maintenance, the master and block valves were inspected for any signs of wear or damage.
维护期间，主阀和闸板阀被检查是否有磨损或损坏的迹象。