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绞车的保险闸是绞车必不可少的安全装置。由于现用绞车保险闸的制动电磁铁系交流电源,运行时噪音较大,容易使绞车司机产生疲劳感,因此有的单
The safety winch winch is an essential safety device winch. Since the existing winch brake brake solenoid AC power supply, run-time noise, easy to make the winch driver fatigue, so some single