... extrusion machine. 3.Innovative & high efficiency, high compression strength board. PRODUCT OVERVIEW It is Junsheng`s innovation, which has broken ... It is mainly applied to draining board production lines of tunnel, roof planting, roof board planting, construction of underground works, water ... . The production line can produce many series of drainage board.The dimple's height can be 8mm,12mm,16mm,20mm ...