1·Traditional method for overhaul of the top of miter gate is through manual operation by hydraulic hoisting jack which has the shortcomings of low efficiency and great risk.
摘要船闸人字门顶门检修的传统方法是采用液压千斤顶手动作业，工作效率低，时间长，技术风险大。
2·Relaxes the brake, the heavy item then voluntarily fast drops, reduces the return trip time, but this kind of hoisting jack structure is complex.
放松制动器，重物即可自行快速下降，缩短返程时间，但这种千斤顶构造较复杂。
3·This paper expounds the design of processing techniques before hole-boring on the cylinder of upright post and hoisting jack used in the hydraulic support.
阐述了液压支架所用立柱、千斤顶的缸筒在上深孔钻镗床进行镗孔、滚压之前必须进行的加工工艺的设计。
4·Introduced USES the ANSYS software establishment hydraulic power support hoisting jack the method.
介绍了利用A NSYS软件建立液压支架千斤顶的模型方法。