上装组成部分：臂架系统、转台、回转机构、固定转塔、支撑支腿等。主要作用：完成混凝土的输送并支撑整车，保证其稳定性。

Up-loading System: Boom system, Rotary table, Slewing mechanism, Fixed turret, Landing leg. Main function: Complete the concrete delivery and placing which support the vehicle to ensure its stability.

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方法：17例胫腓骨远端开放性粉碎骨折急诊行清创单臂外固定架固定。

Methods 17 cases of fractures were cleaned and fixed on the single arm fix frame in the emergency treatment.

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目的：探讨单臂外固定架结合自体骨髓移植治疗胫腓骨远端开放性粉碎骨折的疗效。

Objective to investigate the effect of single arm outer fix frame combined with autogenous bone marrow grafting for opened comminuted fracture at distal tibia and fibula.

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