According to smelting condition of Baotou iron and steel group, VD refining process should be adopted to reduce the hydrogen content in the heavy rail steel.
根据包钢重轨钢的冶炼条件，采用VD真空处理降低钢液中氢含量是完全必要的。
2
The two women leaned upon the wrought-iron window rail in the shadow of the curtains.
两个女人在窗帘的遮掩下，把胳膊肘支在铁栏杆上。
3
Rail concentrates covered processing and sintering, iron ore processing.