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==学爸优选 FPSer.com 微信 582229== 2025-01-23 04:12:38 | |||
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01-简单机械引入.mp4 | 2024-05-13 03:49:54 | 20.86 MB | |
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02-杠杆.mp4 | 2024-05-13 03:49:54 | 84.66 MB | |
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03-力和力臂.mp4 | 2024-05-13 03:49:54 | 93.72 MB | |
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04-杠杆平衡条件.mp4 | 2024-05-13 03:49:54 | 108.72 MB | |
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05-杠杆的分类.mp4 | 2024-05-13 03:49:54 | 98.08 MB | |
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06-定滑轮和动滑轮.mp4 | 2024-05-13 03:49:54 | 94.15 MB | |
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07-滑轮组（上）.mp4 | 2024-05-13 03:49:54 | 113.47 MB | |
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08-滑轮组（下）.mp4 | 2024-05-13 03:49:54 | 110.96 MB | |
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09-有质量的滑轮.mp4 | 2024-05-13 03:49:54 | 77.41 MB | |
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17-有用功和额外功.mp4 | 2024-05-13 03:49:54 | 83.1 MB | |
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18-机械效率.mp4 | 2024-05-13 03:49:54 | 76.63 MB | |
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19-提高机械效率.mp4 | 2024-05-13 03:49:54 | 58.93 MB | |