常見例句雙語例句Therefore, the water leak failure of 4-way reversing valve for air-conditioning is caused by the cracking stems inside, which results form the large amount …空調四通換向閥失效是封頭的開裂引起的，而封頭的開裂與封頭材料內部有大量軸向分布的硫化錳夾雜物有關。 返回 air reversing valve