Valve rod seal packing can adopt lip shape structure, seal up dependable, Operates moment of force small.

阀杆密封填料可采用唇形结构，密封可靠、操作力矩小。

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Valve rod seal packing can adopt lip shape structure, seal up dependable, Operates moment of force small.

阀杆密封填料可采用唇形结构，密封可靠、操作力矩小。

youdao