kevinyan1107

kevinyan1107

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380 We are also studying the possible varying of this form of attack, viz., acoustic mines and supersonic mines. Thirty ardent experts are pursuing these possibilities, but I am not yet able to say that they have found a cure. It is well to ponder this side of the naval war. In the event a significant proportion of our whole war effort had to be devoted to combating the mine. A vast output of material and money was diverted from other tasks, and many thousa

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