... bridges and irrigation works; rustproof, de-oxidation, and paint removal for metallic parts.Main structureInner layer: Using natural ... sediment, ball bearing, cement powder, cement concrete, dry powder mortar, coal fines, carbon powder, and mineral powder.Technology parametersNote: 1.The weights ... ,10,12,18 ect. LaiZhou Kiynn Rubber&Plastic Products Co., LtdTel: +86-535-2418678Fax: +86-535-2419679Mob:+ ...