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撃墜対被撃墜比率
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Wikipedia definition
1. Loss exchange ratio​Loss exchange ratio is a figure of merit in attrition warfare. It is usually relevant to a condition or state of war where one side depletes the resources of another through attrition. Specifically and most often used as a comparator in aerial combat, where it is known as a "kill-ratio. " For example, during the Korean War, American combat jets had a kill-ratio of 12-1 and often higher (stated as twelve to one).
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