girdern.[建]大梁
girder face plate桁材面板
girder body design梁体设计
girder transporter运梁车
girder of airscrew叶梁
girder replacement换梁
girder sclerenchyma工字厚壁组织
girder joint scheme合拢方案
girder's distortion乳香酸
girder construction梁结构
girder-type bridge梁式桥