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详细介绍了电缆卷筒自动收放装置的结构特点、关键技术及设计要点，通过国内外技术水平的对比和工业应用，证明了该装置结构合理、安全可靠，实现了尾部电缆拖动的机械化、自动化，大大提高了挖掘机的工作效率，具有推广应用价值.
The structural characteristics, key technologies and design points of the cable drum automatic retractable device are introduced in detail. By comparing the technical level with that of the industrial application at home and abroad, it is proved that the device is reasonable in structure, safe and reliable, and realizes the mechanization of tail cable dragging, Automation, greatly improving the working efficiency of excavators, with the promotion and application value.