独立烟囱顶上环形避雷带及引下线,当采用热镀锌圆钢或扁钢时,其截面规格符 合要求的

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问题 独立烟囱顶上环形避雷带及引下线,当采用热镀锌圆钢或扁钢时,其截面规格符 合要求的是()。A.圆钢直径不小于8mm,扁钢截面不小于48mm2,厚度不小于4mm;B.圆钢直径不小于10mm,扁钢截面不小于80mm2’厚度不小于4mm; C圆钢直径不小于12mm,扁钢截面不小于100mm2,厚度不小于3mm; D圆钢直径不小于12mm,扁钢截面不小于1OOmm2,厚度不小于4mm。

选项 A.圆钢直径不小于8mm,扁钢截面不小于48mm2,厚度不小于4mm;
B.圆钢直径不小于10mm,扁钢截面不小于80mm2’厚度不小于4mm;
C圆钢直径不小于12mm,扁钢截面不小于100mm2,厚度不小于3mm;
D圆钢直径不小于12mm,扁钢截面不小于1OOmm2,厚度不小于4mm。

答案 D

解析
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