Debus turn head in the manhole 2 to have equipments smoothly entered.
在人井2中，将弯头卸下，便于设备进入。

The Application of Tangential Huff Debus in Coal Preparation Technology
切向吹气卸饼方式在选煤技术中的应用

Lamp holder had better use formula blocking an opening, in spend gently it is easier than snail mouth bulb after rusting debus.
灯头最好用卡口式，在轻度生锈后它比螺口灯泡更轻易卸下。