One end of the windpipe is connected with a unidirectional inflating valve.
气管的一端与单向充气阀连接。
The vacuum freshness preservation box comprises a box body, a cover body, an inflating valve and an air pumping valve.
真空保鲜盒包括盒体，盖体，充气阀和抽气阀。
The alarm air valve can be directly installed on the inflating valve of an automobile tyre, and has simple structure, convenient installation and low cost.
本实用新型可直接装于机动车轮胎气门嘴上，结构简单，安装方便，造价低。
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