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为了适应六层以下装配式大板住宅建筑施工需要,四川省第三建筑工程公司试制了一台60吨·米塔式起重机(见附图)。60吨·米塔式起重机系动臂下旋全回转轨
In order to meet the construction needs of six-story prefabricated large-scale residential buildings, the Sichuan Provincial No. 3 Construction Engineering Company produced a 60-ton M tower crane (see attached figure). 60 tons of tower cranes