spring opposed valve

valve 阀门专业词汇A-Z ... spring-opposed air valve 弹簧承力空气阀 spring-opposed valve 弹簧加载的阀 ...

... ) spring-loaded needle valve 弹簧加载式针阀 ) spring-opposed valve 弹簧加载阀 ) spring-biased valve 弹簧加载的阀液> ...