<pre id="rrnnr"><b id="rrnnr"><thead id="rrnnr"></thead></b></pre>
          <p id="rrnnr"><mark id="rrnnr"><thead id="rrnnr"></thead></mark></p>

            小苹果WWW在线观看免费

            Damage to rubber valve after aging

            2018-12-24 51

            Because the tire valve is formed by the end of the matter, because a small thing lost more than a small valve!


            Because the valve is an aging problem that cannot be prevented by the rubber material, the valve collar will gradually crack, deform and lose its elasticity. When the vehicle is moving, the rubber valve will also be shaken back and forth with the centrifugal force.


            Recommended news