The sealing ring by a similar to the rubber or plastic non-metallic materials.
该密封圈由一种类似于橡胶或塑料的非金属材料制成。
Accessories package: protect ring, plastic cap screw.
配件包：护线圈及胶帽螺钉。
The sealed ring is made of elastic material, such as rubber, or rubber plastic, etc.
密封圈采用橡胶或橡塑一类弹性材料制造。
The sealed ring is made of elastic material, such as rubber, or rubber plastic, etc.
密封圈采用橡胶或橡塑一类弹性材料制造。
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