The application of residue - removing drumscreen in the flotation workshop of Donganshan Sintering Plant is described.
介绍了东鞍山烧结厂浮选车间应用圆筒除渣筛的应用情况。
2
Shadow puppets, displayed on the screen and steered by people behind, and the rattle-drum which can make the rattling sound by shaken are also favorites amongst children.
皮影戏，在屏幕上显示的人背后操纵，和拨浪鼓可以通过摇动使声音也最爱儿童。
3
The screen reel drum and the card-shelf reel drum are fixed above the blackboard, and the picture clip is fixed on the upper frame of the blackboard;