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为什么双肩包要单肩背呢
更新时间: 2020-07-03 00:00:00  

原因如下:

1、双肩包的肩带都是为双肩同时承重设计的。

2、单肩背容易导致肩带超过负荷极限,导致肩带断裂。

3、双肩包的双肩设计可以使承受的压力均衡。

关键词: 为什么 双肩包

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