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多路换向操纵阀是我厂的定型产品，常年发放在各野外地质队和其他的有关工业部门使用，但有不少的单位来信反映：“调压阀体体内阀座，有的被压力油冲出来”。这是在工艺中长期存在而尚未解决的加
Multi-way directional control valve is a stereotyped product of our factory. It is used year-round in various field geological teams and other relevant industrial departments. However, many units wrote letters to reflect: “Regulating the valve seat body in the body and some being pressured Oil rushed out. ” This is an unresolved addition that has long existed in the process