目前，液压阀存在互换性差、不对称阀芯的设计加工困难等不足。
At present, hydraulic valve has the deficiency of inadequate interchangeability and machining difficulty of unsymmetrical valve spool.
目前，液压阀存在互换性差、不对称阀芯的设计加工困难等不足。
At present, hydraulic valve has the deficiency of inadequate interchangeability and machining difficulty of unsymmetrical valve spool.
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