spring-loaded check valve

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1.	弹簧止回阀 valve... ... spring-disk valve 簧盘阀 spring-loaded check valve 弹簧止回阀 spring-loaded idling valve 弹簧加压怠速阀 ... www.douban.com
2.	弹簧加载止回阀 ... spring-hysteresis error 弹簧滞后误差 spring-loaded check valve 弹簧加载止回阀 spring-loaded pushbutton 微动按钮 ... www.oilnews.com.cn
3.	弹簧复位单向阀 GB/T 17446-1998... ... 4.2 单向阀 check valve；non-return valve 4.2.1.1 弹簧复位单向阀 spring-loaded check valve ... www.wwwstandard.cn