Parts of the mechanical structure: this chapter introduced the design of manipulator and bogie phoning trailer honing rack, windlass, upper support frame, low support frame and roller etc in detail.
机械部分：本文主要详细介绍了机械手及行走机构、珩架拖动小车、珩架、卷扬机、上支架、下支架、滚轮等的设计。
James Bogardus (1800-1874) built the pioneering Cast Iron Building, New York (1848), with a rigid iron frame providing the main support for upper-floor and roof loads.
摩天大楼的先驱是博加德斯（1800～1874）在纽约市建造的铸铁大厦（1848），以牢固的铁骨架主要承载上层和屋顶的负荷。
A parallelogram linkage mechanism composed of L-shaped lower swing arm, upper arm and bushing support frame ensures travel stability of the forklift.
当L形下摆臂、上摆臂、套筒支架和车架组成平行四杆机构时，双摆臂联动悬架能够保证车辆在行驶过程中具有较高的行驶稳定性。
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