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1986年7月21日至22日,机械工业部重型矿山机械工业局委托江苏省机械工业厅在东台主持通过了DD25型导杆式柴油打桩机技术鉴定。
From July 21 to July 22, 1986, the Heavy Mining Machinery Industry Bureau of the Ministry of Machinery Industry commissioned the Jiangsu Provincial Machinery Industry Department to preside over the DD25 guide rod diesel pile driver technical appraisal in Dongtai.