handhole cover的意思|示意
观察孔盖
handhole cover相关短语
1、 handhole cover yoke 手孔轭
2、 handhole cover plate 手孔板
3、 handhole cover plate gasket 手孔板垫密片
4、 handhole with flat cover 平盖手孔
5、 quick-opening handhole with rotatable cover 回转盖快开手孔
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英 / /