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顺风耳 人类制造


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人类的想象力的无限的,人类的动手能力是强大的。在二战期间,荷兰军队就制造了这些顺风耳(声学收听设备),希望能在遥听千里之外的战机。有没有功效呢?可想最终还是败在了德军的闪电战。

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