短語詞組短語cross -beam temperature measuring 十字測溫movable cross -beam 移動(dòng)橫梁prestressed concrete cross -beam 預(yù)應(yīng)力井式梁virtual cross -beam method 虛擬交叉梁法laser cross -beam velocimeter 交叉激光束速度計(jì)uniform cross -section beam 等截面粱 返回 cross-beam