Chemical weathering was beginning to attack the unweathered bedrock. 化學(xué)侵蝕作用開(kāi)始攻擊還未侵蝕的巖床。
The wall must be protected against chemical attack from highly corrosive components of the combusting gases. 必須把室壁保護起來(lái)以防止來(lái)自燃氣的高度腐蝕性成分的化學(xué)侵蝕。
Depending on the system specified, these products provide increased chemical resistance to strong acids, salts, and solvents, and hydrofluoric acid exposure. 根據系統的特性，這些產(chǎn)品可以表現更好的耐強酸堿，溶劑和氫氟酸化學(xué)腐蝕。
