Not leak in the hydraulic oil, may also reduce the pressure.

在液压油不泄漏的情况下，压力也可能减低。

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By analysing principle, hydraulic pressure, seal, the feasibility of oil pressure method about main gear in striking refinement vanadium steel converter are discussed.

通过对油压法的原理、液压力、密封等进行分析，阐明油压法在提钒转炉大齿轮拆除中的可行性。

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Hydraulic oil flush return circuit, pressure filter and pressure breaking device are added to the systems, solving the problems in design and application of hydrostatic transmission systems.

设计中增加了液压油冲洗回路、压力滤油器和压力切断装置，解决了静压传动系统应用设计中的问题。

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It is powered by an engine which drives a hydraulic pump to send oil under high pressure around its plumbing in order to animate its limbs.

BBC: BigDog four-legged robot now sports throwing arm