... Water Materials Comapny and Sino-SouthKorea Joint Venture Henan Changmao Yuanyi Valve Co.,Ltd , we specialize in the enquipment ... high media resistance and climate , also called rubber joint,soft joint,shock absorber,tube vibration isolator,pipe shock absorber , ... are key indicator when pruchase products ,sino south korea joint venture obviously introduce ur advanced and leading technology and science ...