阀体伸缩器只作用于方便阀门本身的启闭，不能代替管道中应设有的伸缩器。

The valve body expansion pipe is only used to open or close the valve, but can not replace the expansion pipe in the pipe.

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杠杆式安全阀主要依靠杠杆重锤的作用力而工作，但由于杠杆式安全阀体积庞大往往限制了选用范围。

Lever-type safety valve lever to rely mainly on the weight of the work force, but the lever-type safety valve size often limit the choice of scope.

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作用于水压阀阀芯及阀体上的力特性分析。

Analysis of the force on water hydraulic valves.

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