发布时间:2025-01-18 03:43:29
这是一个梯形台体积求取问题,可套用梯形台体积公式:
可得 [35*7+40*12+根号(35*7*40*12)]*5/3,约等于1780立方米。
100平米电磁采暖炉的耗电量有多大电磁采暖炉功率选择的计算方法是
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