作者: Jay L. Sackett , Norman C. Kerr
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摘要: A power back door for a vehicle, in which the is automatically opened and closed by pair of drive devices, each devices including an inner tube encompassed outer tube; motor; spindle screw that turned nut attached to one end travels up down cause extend contract relative over length travel; stopper fixed stop movement at travel. travel different than other allowing be quickly without bouncing full open.