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device for forspenning of berande constructions of stole
device for forspenning of berande constructions of stole
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机译:椅子的钢结构预应力装置
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摘要
The working platform 1 of trestle bridge scaffolding is strengthened by two trussing members 2 demountably attached to the bridge, between which extends a tensioning member 3. Each trussing member 2 consists of rods 5, 6, 7, 9 arranged in a triangular configuration. IMAGE
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