1. Design of membrane frameThe main skeleton design uses I-beam steel, focusing on neat and solid appearance, including local strengthening design.The design of the main skeleton is made of I-beam steel, mainly focusing on a neat and strong shape, including local strengthening design. The design is mainly based on the selection of some components that are used frequently and are more critical in the liquid air separation plant, including regulators, manual valves, duplexes, needle valves and oth...