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Method and apparatus for mounting a davit on a roof structure
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Mobile outrigger for suspending scaffold
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Automatic window washer
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Roof support system for a suspended staging
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Suspended staging type welding machine
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Universal joint
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Oil lubrication system for a staging winch drive
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Single lever throttle and shift control mechanism
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Special purpose suspended staging
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Level winding winch mechanism
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Level winding winch mechanism
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