The ingot annealing technology in some alloying steel plant have been investigated.

调查分析了一些特殊钢厂的钢锭退火工艺规范。

youdao

The ingot annealing technology in some alloying steel plant have been investigated.

调查分析了一些特殊钢厂的钢锭退火工艺规范。

youdao