... We produce forging parts for petroleum machinery , hydraulic machinery forging, construction machienry, mining machinery and so on.Founded in 1969 ... 5T/3T Electric-hydraulic hammers, 3T/1T/750kg board drop hammers, various types of air hammers, 12 ... , Dezhou United Petroleum Machinery, Jier Machine-tool Group Co., Ltd., Shantui Construction Machinery, Beijing Baoji Machinery, Liuzhou Engineering Company ...