sealing without gaskets ; seal without gasket
无垫压力偶密封 self-seal by pressure coupling
无孔密封垫 unpunched gasket
无石棉密封垫 Non-asbestos gasket
这是一种一片式无内垫瓶盖，其密封结构与瓶盖外壳紧密结合。
It is a 1 piece linerless closure with its sealing structure being integrated into the shell.
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模块下移
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