... :-2.5~+2.5% medium:natural gas,town gas,LPG 1 The Exterior Figure of Our ... pressure pipe network in the city, as a city gate stations, gas pipelines and distribution stations ... scale manufacturer of all types of valves, gas pressure regulators, integrating development and production together. ... was established in 1952, we have rich experience in Gas equipment, and we enjoy great fame in most places ...