发布时间:2025-01-31 23:38:08
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。
我公司有一层大部分烟感报故障五只手报二只报故障但指示灯全部不亮是什么原因怎么维修
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