During a procedure, the traction rope of the subject tm-400 device got stuck.Even after waiting a while to try to pull out the rope, the rope was still stuck and could not be pulled out.After turning off the power and trying to resume the procedure, the rope could be reeled up and a smooth traction was resumed.When the traction power level was set from 0 to 60%, the rope got stuck instantaneously and then started traction with a high speed (a speed of 60 to 100% traction power).When the 90kg setting was selected, the rope became stuck without exception.
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