hydraulic rail pulling device是什么意思

用法例句

This paper briefly expounds the working principles of the hydraulic bolt tensioning jack, analyzes the features of the hydraulic bolt tensioning jack, and emphatically probes into the problems existing in its application and solving methods.

简述了液压螺栓拉伸器的工作原理,分析了液压螺栓拉伸器的特点,重点探讨了其使用中存在的问题及解决办法。