Qingdao QY Liquid Crystal Co., Ltd. is a professional manufacturer and exporter of liquid crystal materials and LC mixtures in China, especially for PDLC. Our factory has the R & D center and big production base, we also cooperate with a number of universities in researching the new product and new technology. Our experienced R&D team have the strong interest to research new goods as request. We also signed the Exclusive Agency Agreement

This Spiral Corrugated Post-Tensioning Tube Making Machine is special for producing round corrugated ducts used in expressway, bridge, train and large-span post-tension concrete project. The prestressed Protection Tube Machine is suitable for both indoor and site work. With its special corrugations, a very high radial stiffness well adapted for use as former in concrete structures. Corrugated tube is also being used as culverts and forms for conc