Mellon Shanghai valve manufacturing co., LTD is a backbone professional production valve manufacturers, general machinery company is through ISO9001 international quality certification system certification enterprises, products are in strict accordance with GB / 2220 - GB122252-89 and the relevant standards for the design and manufacture, all through the "Shanghai gm okmo product quality supervision and inspection", and strictly according to the valve pressure test GBT / 1392-1392, qualified...
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