cross footing英 [krɒs ˈfʊtɪŋ]美 [krɔːs ˈfʊtɪŋ]网络 横向[交叉]计算计算机双语例句Construction Method for Constant Cross Section Inclined Footing Foundation of Steel Transmission Tower输电铁塔等截面斜柱式基础的施工方法