发布时间:2025-01-24 13:54:48
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一个圆柱形排水管底面半径5cm长2m做20节这样的排水管需要铁皮多少平方米
2025-01-24 13:54:48 2025-01-24 13:54:48 2025-01-24 13:54:48 2025-01-24 13:54:48 2025-01-24 13:54:48 2025-01-24 13:54:48 2025-01-24 13:54:48 2025-01-24 13:54:48 2025-01-24 13:54:48 2025-01-24 13:54:48 2025-01-24 13:54:48 2025-01-24 13:54:48 2025-01-24 13:54:48 2025-01-24 13:54:48 2025-01-24 13:54:48 2025-01-24 13:54:48 2025-01-24 13:54:48急求就用三个三极管做一个简易的无线对讲机纯晶体管的要有详细图应该是比较简单的图不要太复杂
2025-01-24 13:54:48