短语词组短语cross -beam 横梁;交叉束cross s beam 横梁cross prestressed beam 交叉预应力梁cross foundation beam 十字交叉基础梁cross bearing beam 支撑梁uniform cross section beam 等截面粱cross elastic beam 十字交叉弹性地基梁cross slope beam 横斜梁 返回 cross beam