wall board making machine: 1.quickly hard, high strength, waterproof ,fireproofing, 2.low cost 3.non-toxic II. Project Feature1. The source of the production raw materials is widely with no regional restriction. The product is made of sawdust, straw (rice hulls), many kinds of crop straw and inorganic material (such as talcum powder, infusorial earth and powder coal ash) after special technology. ...