Wuyi County for a long time is a good standard Instrument earlier in the production of standard foam manufacturers, has extensive experience and advanced equipment, our factory standard foam focused research and development, production and sales. Main products: high-precision glass vial bubble, bubble ordinary glass vial, glass circular level bubble, bubble glass outer arc level, glass-emitting standard foam, metal circular level bubble, metal luminous standard foam, plexiglass circular level bubble, plexiglass long standard foam, plexiglass long standard foam, Plexiglas outer arc length standard foam, electronic length standard, electronic universal spirit level and standard foam components and other products, some products of national patents, products widely used in geodesy, laser equi.. (more>>)