本实用新型结构简单，装饰盖与闷盖或丝堵具有互换性，操作使用简便易行。
The utility model has simple structure, and the decorative cover is interchangeable with the blank cap or the screw plug, which simplifies operation and use.
本实用新型结构简单，装饰盖与闷盖或丝堵具有互换性，操作使用简便易行。
The utility model has simple structure, and the decorative cover is interchangeable with the blank cap or the screw plug, which simplifies operation and use.
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