When the trap door on the bottom of the muller is opened it will form the third side of the shoot to direct the mulled sand into a bucket or container.
当穆勒的底部的活门打开，将形成的拍摄第三方直接进入水桶或容器的心理转折实在不足沙子。
2
This style have multi-fashion, opening ways are side hung, horizontally slide, and bottom hung in door closed condition. Have superior security and indoor ventilate function.