barrage balloon
柯林斯词典
1. N one of a number of tethered balloons with cables or net suspended from them, used to deter low-flying air attack 防空氣球; 一連串氣球中的一個,氣球上懸掛著纜繩或羅網,用來防止低空空襲
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1. N one of a number of tethered balloons with cables or net suspended from them, used to deter low-flying air attack 防空氣球; 一連串氣球中的一個,氣球上懸掛著纜繩或羅網,用來防止低空空襲