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线材经拉伸后有氧化变色()是造成氧化的主要原因之一。A、配模不当B、模孔定径区过长C、压缩率过大D、润滑液温度过高,流量不足...
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在工艺规定的温度作用下,塑料由固态变为()的可塑物体。...
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钢芯铝绞线按GB/T1179-1999标准规定,其最外层节径比为()。A、10~12B、12~14C、10~14D、14~16...
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铝包钢线目前已用于架空地线中的全铝包钢绞和和铝包线的加强芯,它们还能用作()。...
Friday, February 9, 2024
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导电线芯直径为0.6mm的通信电缆,成品上导体的断裂伸长率不小于()。A、17%B、21%C、19%D、15%...
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电阻对焊具有接头可靠、效率高、消耗低、机械化自动化程度高、劳动条件好等优点。...
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