APPLICATION OF SQUARE PIPE STRUCTURE TO STRUCTURAL DESIGN OF MILL BUILDING ROOF FOR RAIL BEAM WORKSHOP OF BAOTOU IRON AND STEEL COMPDANY是什麼意思_APPLICATION OF SQUARE PIPE STRUCTURE TO STRUCTURAL DESIGN OF MILL BUILDING ROOF FOR RAIL BEAM WORKSHOP OF BAOTOU IRON AND STEEL COMPDANY在線翻譯_英語_讀音_用法_例句