check-valve lever spring
... check-valve lever 止回阀杆 check-valve lever spring 止回阀杆弹簧 check-valve nozzle 止回阀喷嘴 ...
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双瓣止回阀主要由阀体、阀瓣、阀杆及弹簧等重要零件组成，并采用薄型轻巧设计。
Double disc check valve consists of body, disc, valve rod and spring and other parts. The valve is designed with slim light weight.
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