Pressure relief valve to prevent over inflation of the air bag.
泄压阀可以避免气囊过分膨胀。
When the tyre central deflation system is not used, the tyre inflation or deflation can be realized through the air valve and the use of the car will no be affected.
在不使用轮胎中央充放气系统的状态下，可以通过气嘴向轮胎进行充气或放气，不影响整车的使用。
When the air pressure of the inner tube rises to a rated value, the one-way valve is closed, and the inflation process is completed.
内胎气压升高到额定值时，单向阀关闭，充气过程即结束。
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