Optimum design of lifting jack of model 150 drum shearer 150型采煤机调高油缸的优化设计
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Fixed railway installations . track service and maintenance tools . rail lifting jacks with crank . characteristics 铁路固定装置.铁路使用和维护工具.带曲柄起轨千斤顶.特性
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Fixed railway installations . track service and maintenance tools . lever - operated 50 kn track lifting jacks . characteristics 铁路固定装置.轨道装置和维护工具. 50 kn扛杆起轨千斤顶.性能
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The final assembly was usually aided by using hydraulic lifting jacks , but in this case , the hull was placed on an elevated assembly jig in order to install the final components such as the running gear , turret , and armament 总装通常使用液压起重机，由于这个关系，车体被钓钩起钓升高位置，以便于安装例如传动装置、炮塔和武备等最后的部分。
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