发布时间:2025-01-19 22:14:15
国标H型钢:窄翼缘HN250×125型号,248×124×5×8 ,截面积3289mm²,重量25.8kg/m。
即截面高248mm、截面宽124mm、腹板厚5mm、翼缘厚8mm.
毛巾为什么会黏糊糊的(是毛巾质量问题吗(毛巾为什么会黏糊糊的破掉...
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