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在1945年2月的硫黄岛战役中,美军向该岛纵深推进时,突然在西南火山锥形地带遭到来自日军大片地堡群强有力的火力阻击。尽管美军多次组织猛烈的炮击和强攻,但因日军地堡大都构筑在火山熔岩之下,十分坚固,而且明暗结合,配置巧妙,因而美军始终未能前进一步。面对这个难以逾越的天险,美军指挥官斯普鲁恩斯连忙召集各方面人士商议对策。这时,负责建筑工程的技术人员提出了一个新奇的建议。他们认为,日军的连环地堡虽然坚固,却存在致命的弱点,就是出入口非常狭小,如果用坦克改装的推土机携带混凝土,对地堡出入口实施封闭,不仅可以很快使地堡丧失战斗力,还可以大大减少炮弹的消耗。斯普鲁恩斯对此深表赞许。次日清早,美军的炮声停息了,滩头一片忙碌景象。大
During the battle of Sovereign Island in February 1945, when the U.S. forces pushed the island for a long time, they suddenly came under fire from large bunkers of the Japanese army in the cone of the southwestern volcano. Although the U.S. military organized violent shelling and assault on numerous occasions, the U.S. military has failed to make any further progress because the Japanese bunkers are mostly built under volcanic lava and are strong, light and dark, and well-equipped. Faced with this insurmountable natural risk, the U.S. commander Spruance quickly called people from all walks of life to discuss the countermeasures. At this moment, the technician in charge of the construction project made a novel proposal. They think that although the Japanese Bunkyo bunker is strong, there are still some fatal weaknesses, ie the entrances and exits are very narrow. If a tank-modified bulldozer is used to carry concrete to close the bunker entrances and closings, not only can the bunkers be quickly extinguished and the shells can be greatly reduced The consumption. Spruance deeply praised. The next morning, the American guns stopped, and the beach was a busy sight. Big