An improved torsional limiting device and associated control system are incorporated in {HEAD ~ a large scale} trencher between the power source and the cutting wheel to provide for {TAIL ~ protection} of the equipment components in the event the cutting wheel encounters unforeseen obstructions 
An improved torsional limiting device and associated control system are incorporated in { HEAD ~ a large scale } trencher between the power source and the cutting wheel to provide for { TAIL ~ protection } of the equipment components in the event the cutting wheel encounters unforeseen obstructions
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