As long as the valve closure effect is good, when the pressure, high pressure cut-off valve is closed, the back-end pressure volume smaller, pressure.
只要阀门关闭效果良好，保压时，高压截止阀关闭，后端压力容积变小，压力增大。
As long as the valve closure effect is good, when the pressure, high pressure cut-off valve is closed, the back-end pressure volume smaller, pressure.
只要阀门关闭效果良好，保压时，高压截止阀关闭，后端压力容积变小，压力增大。
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