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Heavy manhole cover lifter - has wheeled triangular frame with swivel beam carrying end hooks and long handle giving high mechanical advantage
Heavy manhole cover lifter - has wheeled triangular frame with swivel beam carrying end hooks and long handle giving high mechanical advantage
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机译:重型人孔盖升降机-带有轮式三角架,带有可旋转的梁承载端钩和长手柄,具有很高的机械优势
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摘要
The lifter consists of a triangular frame (5, 6, 7) whose top member (7) is extended forwards to carry a hook (9) which engages a pin fixed to a beam (18). The beam has a hook (19) at each end which can fit under the lifting recesses in the cover (24). The other end of the top member carries a long handle (13) with a bar (14). This handle enables the user to pivot the apparatus about the axle (3) with a high mechanical advantage.
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