som

Based on engineering practice, discusses som e characteristics of air conditioning design in large space buildings with light s teel frames.

结合工程实践,探讨了大空间建筑空调设计的特点。

Therefore,the several rephosphorization prevention methods are put forward by slag optical basicity control when the som...

由此提出在转炉下渣条件下,控制钢包渣光学碱度来控制回磷的几点措施。