Portable reel jack stand
作者： Harold F. Woodruff
DOI:
关键词:
摘要: A portable reel jack stand has dual support units which are oppositely positioned and adapted to lift a rotatably therebetween. Each unit retractible rollers operative permit movement of the when is not being supported thereby. engaging carried upon telescopic members slidably engaged with each facilitate rotation reel. At least one braking assembly control rotation. hydraulic cause upward thereby occasioning lifting
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