Jack: in practical mechanics, portable hand-operated device for raising heavy weights through short distances, exerting great pressures, or holding assembled work firmly in position.
千斤顶：在应用力学中，指携带方便、以手操作的装置，可将重物稍微抬高，能施加巨大压力，或将装配好的对象牢固地支撑在原地。
As the volume of newly operated unit increases, rotor's weight increases as well and has higher requirement for jack pump system.
同时随着新上机组容量的增大，转子的重量也随之加大，对顶轴油系统的要求也越来越高。
Horizontally pushing lifting jack of direct shear tests are operated on rock mass shear strength test. - center point group analysis is used for treating shear test data.
用平推法直剪试验进行岩体抗剪断强度试验，用-点群中心法处理直剪试验数据。
Horizontally pushing lifting jack of direct shear tests are operated on rock mass shear strength test. - center point group analysis is used for treating shear test data.
用平推法直剪试验进行岩体抗剪断强度试验，用-点群中心法处理直剪试验数据。
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