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由全国建筑机械化情报总网和机械施工公司情报分网联合主办的“桩工机械与地基加固技术经验交流会”于1981年5月27日至6月1日在天津市召开。会议交流了八种地基
The exchange of experience in pile-making machinery and foundation reinforcement technology jointly sponsored by the National Construction Machinery Information Network and the Machinery Construction Company Information Sub-network was held in Tianjin from May 27 to June 1, 1981. The meeting exchanged eight kinds of foundations