短語詞組短語main shaft structure 主軸結(jié)構main loading structure 主要承重結(jié)構investment main body structure 投資主體結(jié)構Main product structure 主產(chǎn)品結(jié)構main roof structure 老頂結(jié)構three main truss structure 三主桁結(jié)構parallel main memory structure 并行主存結(jié)構main lifting structure 主起升機構main -structure 主結(jié)構 返回 main structure