The utility model has the advantages of simple structure, fewer parts, low processing requirement, easier assembling and disassembling, good sealing performance and prolonged service life.
结构简单、零件少、加工要求低、拆装十 分方便，而且密封好、使用寿命长。
The utility model has the advantages of simple structure, fewer parts, low processing requirement, easier assembling and disassembling, good sealing performance and prolonged service life.
结构简单、零件少、加工要求低、拆装十 分方便，而且密封好、使用寿命长。
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