Drain Valve, HAVC Valve, Industrial Valve manufacturer / supplier in China, offering Customized Huhang DSC01795 Pipe Specification DN20-DN800 for Versatile Use, Huhang DSC01795 Customized Color DN20-DN800 Pipe for Industrial Applications, Hahs940X Customized Pipe by Huhang, Available in DN20-DN800 Sizes and so on.