常見例句雙語例句The iron powder quality is ensured through tunnel kiln reduction and second reduction by using iron scale of high grade as raw material.以優(yōu)質(zhì)鉄鱗爲原料，加強隧道窰和二次精還原工藝技術(shù)琯理，確保鉄粉質(zhì)量。 返回 tunnel kiln reduction