发布时间:2025-02-04 19:11:42
水槽体积为4000立方厘米,流量为30x3.14=94.2平方厘米,装满水槽所需时间=4000/94.2=42.5s<50s 所以可以装满
玻璃杯怎么洗才不会留水印 玻璃杯怎么洗才又亮又干净又没有水印
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