coal box

When the flange hole of coal blower casing and inlet box is countersunk, the problem of connecting hole back spot facing can be effectively solved.

它可以有效地解决在锪煤气鼓风机铸铁机壳和进气箱的开箱法兰把接孔时，连接孔背面的锪平问题。

The necessity of seasoning to coal winning machine box

采煤机箱体时效的必要性

The high speed shaft of the coal mill gear box for the boiler in a power plant broke, and the double-row self-aligning roller bearing was damaged.

某电厂发生锅炉磨煤机变速箱高速轴断裂，双列调心滚子轴承损坏。

He couldn't add more coal, for Scrooge kept the coal box in his own room.

他不能添加煤炭, 因为史克鲁奇把煤炭箱放在他自己的房间里.

Main problems in balance wire rope use are: ( 1) coal box dropping leading to balance wire rope pounded breaking;

平衡钢丝绳使用的主要问题是：（1）坠罐造成平衡钢丝绳被砸断；