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由中国建筑科学研究院建筑结构研究所开发四平建筑机械厂试制的YCJ-20型前卡千斤顶日前已正式通过技术鉴定,其各项性能指标均达到城乡建设环境保护部部颁标准JJ23-84“预应力液压拉伸机千斤顶”的规定。
The YCJ-20 type front jack developed by the Institute of Building Structure, China Academy of Building Research, has been formally passed the technical appraisal. The performance indicators of the YCJ-20 front jack have reached the standard JJ23-84 issued by the Ministry of Urban and Rural Construction and Environmental Protection. Prestressed Hydraulic Tensioning Machine Jack".