Most lubricants are necessary, to maintain a certain chemical balance, or there is corrosion.

大多没情况下光滑剂是需要的，以便维持某种化学均衡，否者就会有腐蚀。

youdao

Most lubricants are necessary, to maintain a certain chemical balance, or there is corrosion.

大多没情况下光滑剂是需要的，以便维持某种化学均衡，否者就会有腐蚀。

youdao