Qingdao Longtech Machinery Company is one national hi-tech enterprise fully committed to researching and developing continuous winding GRP pipe line, Vacuum Insulation Panels machinery, professional auxiliary machine and relative products, and persevering in R&D and applications of new machinery, new technology and new technique in composites fields. GRP continuous winding pipe line is first independently developed by Lontech in China with invention patent and broke the traditional production history of discontinuous winding. VIP machinery and panels are patented new products and keep the international advanced level of technology by the advanced design and super excellent property.