发布时间:2025-02-08 03:20:55
计算公式:平均值–检测的点数标准差×1.695。钢筋保护层厚度规定:(要算钢筋根数,构件长的两边保护层一般是5-6公分,算钢筋长度时候,钢筋末端的保护层有是2-3公分。)
20音箱 能否后置由于电脑台空间太小想放在后面的书架上可以吗
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