this is an new type one wheat straw roof tile making machine,it is made from straw, stone powder,sand etc... WZ-1380 wheat straw tile machine Check the video:http://www.youtube.com/user/midding222 www.midbm.com.cn[Straw roof tile] 1. wheat straw tile is made of Crop stalks sawdust and all kinds of stones dust, but it is hard as steel, Flexural strength of Landscape orientation More than 4900N/M, ...