... and roller, roller die forging, ring roller dies roller die forging, ring roller dies Founded in 1969, Zhangqiu Baohua Forging Co., ... , Kerui Group, Dezhou United Petroleum Machinery, Jier Machine-tool Group Co., Ltd., Shantui Construction Machinery, Beijing Baoji Machinery, Liuzhou Engineering Company Limited, and ... Paul JingSales managerTel: 0086-13853179742Fax: 0086-531-83861079 ring roller dies