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1. The pump is designed to maintain a constant hydraulic pressure in the system.
该泵设计用来保持系统中的恒定液压压力。
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2. The hydraulic pressure was so high that it caused the valve to stick.
液压压力太高以至于阀门卡住了。
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3. The hydraulic pressure regulator is responsible for maintaining the correct pressure in the system.
液压压力调节器负责维护系统中正确的压力。