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HAIYANG DELI FOUNDRY CO., LTD is a Sino-Korea joint venture and a production base which is famous for sand casting technology. It is established in 1993 and specialized in casting.The factory is main on water glass sand molding process, producing... More
Our valves body and seat are made from alloy steel forgings and alloy steel precision castings. After carbonizing and quenching, the hardness reach HRC58-62 and have high accuracy. Our products are widely used in drilling, workover and fracturing.... More