Prior to hydro test, check torque values again and bring them up to the torque value shown in the Bolting Specification table.
在进行水压测试之前，要再次检查扭矩值，确保扭矩达到螺栓规格表上显示的扭矩值。
This paper derives the characteristic formula of control pressure in hydro-control check valve and the mechanical characteristics formula of inlet and return circuit.
本文推导了液控单向阀的控制压力特性方程、进油和回油回路机械特性方程。
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