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.
平行阀座闸阀由两个可互换弹簧负载阀瓣，一个全导向阀瓣托架和扣环销钉构成。
The parallel seat gate assembly consists of two interchangeable spring loaded discs, a fully guided disc carrier, and retaining pins.
在纽曼帝克75，125和250汽车系列阀符合互换和SAE汽车行业标准。
The Numatics 75, 125, and 250 Automotive Series valves comply with automotive interchangeable and SAE industrial standards.
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