是检修平台起吊机具之一，转动速度慢，传动效率高，集中控制运行安全可靠。
It is one of hoist tools for repairing platform. Its rotating speed is slow and driving efficiency is high and its operation is reliable and safety in concentrated control.
内容涉及基本技术要求、牵引方式、动力分配方式、制动、速度控制、运用与检修等。
They cover basic technical specifications, traction mode, power distribution method, braking, speed control, operation and maintenance.
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