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17462 | 17767 | 8.1户用常见屋面种类及构造-张永帅.mp4 | /uploads/video/1461768522905881.mp4 | video/mp4 | 3 | |
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17469 | 17774 | 8.2不同屋面基础(挂钩)形式-张永帅.mp4 | /uploads/video/1461771838953346.mp4 | video/mp4 | 3 | |
17470 | 17775 | 1461771838953346_low_default.m3u8 | /uploads/video/1461771838953346_low_default.m3u8 | application/vnd.apple.mpegurl | 3 | |
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17476 | 17781 | 8.3支架及组件安装.mp4 | /uploads/video/1461772221937551.mp4 | video/mp4 | 3 | |
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