... 495mm is rolled to required shape from coil opening machine to forming machine and then is bended and bitten to screw ... can be built with an absolute air- watertight system: this advantage allows to storage also liquid products as well as ... gypsum, carbonates, etc), sludge, biomasses, chemical, plastic products and liquids. High quality Corn silo,Wheat silo,soybean storage silo,feed storage silos