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为了满足钻探施工搬迁机械化的要求，减轻工人体力劳动，我队在兄弟单位原“偏心式”液压随车吊的基础上，设计制造了中心立柱式液压随车吊。一、结构特点中心立柱式液压随车吊（下称随车吊）外貌见图
In order to meet the mechanization requirements for drilling and construction relocation and reduce physical labor, our team designed and manufactured the center pillar type hydraulic truck crane on the basis of the original “eccentric” hydraulic truck crane of the fraternal unit. First, the structural characteristics of the center column type hydraulic truck crane (hereinafter referred to as crane) appearance as shown in figure