常見例句雙語例句The proprietary AMSOIL additives form an iron-sulfide barrier coating on gear surfaces, providing the ultimate line of defense against wear, pitting and scoring.專有AMSOIL添加劑形成鐵硫化物的齒輪障涂層表面，提供對磨損防御的最后底線，點(diǎn)蝕和評分。 返回 barrier additives