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HOME CLINIC; Some Hints for Lifting Heavy Objects - The New York Times
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The jack folds to fit in a car and rolls so you can maneuver it about. Operation is simple; load the sheet of drywall on the carriage and crank the handle to raise it. The drywall stays snugly in place while you screw it to the joists. Most back injuries are caused when people try to pick up a heavy object from the ...
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