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如何判断 USB 之类的线材的质量/能力/标准?
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我只能想到连接个移动硬盘来测速, 从而判断是支持 USB 几的线材.
但是手头并没有移动硬盘, 而且这样的方法感觉很麻烦.
还偶尔有判断该线材最大能负载的功率的需求, 不知道怎么办. 买个 USB 功率计吗?
但是手头并没有移动硬盘, 而且这样的方法感觉很麻烦.
还偶尔有判断该线材最大能负载的功率的需求, 不知道怎么办. 买个 USB 功率计吗?
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