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卸扣的横销稍有滑牙，可继续使用。 ((Q1)起重机械指挥)

2022-04-25

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卸扣种类分销子式和螺旋式两种，销子式横轴是光直销，而光直销可不需用开口销来固定。 ((Q1)起重机械指挥)

2022-04-25

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要使吊物平稳，吊钩的重心与物体重心必须在同一条垂线上。 ((Q1)起重机械指挥)

2022-04-25

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要主钩——单手自然握拳，轻触头项。 ((Q1)起重机械指挥)

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液压千斤顶单向阀开关不拧紧液压千斤顶就不能正常顶升。 ((Q1)起重机械指挥)

2022-04-25

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液压千斤顶的起重能力不仅与工作压力有关，还与活塞直径有关。 ((Q1)起重机械指挥)

2022-04-25

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液压千斤顶可通过调节单向阀开启的大小，来控制下降的速度。 ((Q1)起重机械指挥)

2022-04-25

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一般的起重作业是不用考虑物体重心位置的。 ((Q1)起重机械指挥)

2022-04-25

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一般起重作业的方案，都是在起重作业以前应该编制的。 ((Q1)起重机械指挥)

2022-04-25

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一般情况下，跨度小于18米的钢结构桁架可用一个吊点进行吊装。 ((Q1)起重机械指挥)

2022-04-25

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