气门嘴处于上方，拔出气门针，余气放尽；

Above valve mouth in, pull out, give vent to anger door needle, set free to the limit;

youdao

气门嘴处于上方，拔出气门针，余气放尽；

Above valve mouth in, pull out, give vent to anger door needle, set free to the limit;

youdao