high pressure safety valve
low pressure safety valve assembly
low pressure safety valve spring
pressure controlled valve
pressure-controlled valve
ball type surface controlled safety valve
velocity-controlled safety valve
automatic oil-water pressure safety cutout device
auxiliary relief valve pressure
BACK PRESSURE VALVE
逆止阀
背压阀
回压阀
止回阀
向后反射X射线判测法
单向阀
反压阀
止逆阀
back pressure valve(Non-return vale)
brake accumulator charging valve pressure
brake accumulator charging valve pressure check
brake control valve pressure switch
brake oil filter relief valve pressure test