2. When the vehicle is restored to a commercial vehicle after transportation, the air tightness test of the restored commercial vehicle is required to prevent insufficient air pressure of the vehicle after long-term storage.
2, for the whole vehicle back car after transport to resume as a commodity vehicle, the recovery of the commodity car needs to carry out air tightness testing, to prevent long-term storage after the vehicle air pressure is insufficient.
2. In order to prevent the insufficient air pressure after long storage, it is necessary to detect the air tightness of the recovered commercial vehicle when it is restored to commercial vehicle after transportation.<br>