The raw materials for the production of calcium silicate board are widely used. Siliceous materials can be made of quartz sand, diatomaceous earth, fly ash, sand dust, porcelain clay, etc. Calcium materials can be made of quicklime powder, lime paste, slaked lime powder, calcium carbide mud, etc. Glass fiber, mica powder, cellulose, organic synthetic fiber and asbestos fiber can be used. The process for producing calcium silicate board is a molding method, a copying method, and a slurry method. Flexible lift gate is a flexible soft curtain door, inside and outside the two curtains, curtains used between the aluminum beams connected with a vertically movable rail, the roof beams have levels not in the same straight line and hangar large plants in particular be applicable. Flexible lift door installation does not take up interior space in the hole inside. When the fiest move to open the door, and finally superimposed over the hole. Off event curtain rail first and then fall down until it is completely closed. Flexible Gate,Flexible Pvc Aircraft Folding Up Door,Steel Structure Fabric Flexiile Door,Exterior Automatic Flexible Door Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hffastdoor.com