Shandong Dingliang Fire Technology Co., Ltd is one of the largest manufacturer of ductile cast iron grooved fittings and couplings in China. The main products include Rigid Coupling, Flexible Coupling, Eblow, Equal Tee, Reducing Tee, Mechanical Tee, Equal Cross, Flange, Reducer, Cap etc.Our products have got FM and UL approved, and company got ISO certified. All customers from home and abroad are welcomed to visit our company! http://www.ding-liang.com/
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