发布时间:2025-01-19 16:31:27
知道亩数就是知道了面积数,把它们单位统一后,长乘宽等于面积,用面积(亩数)除长度即得宽。
车间产生的烟味非常呛人有什么办法能使办公室的门在关上时是密封的不漏烟味的不影响正常出入
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