短語詞組短語beam crane single -beam crane 單梁起重機rock wall crane -beam 巖壁吊車梁Overhead crane with carrier -beam [機]掛梁橋式起重機single -beam crane 單梁起重機;單軌起重機;繙譯;單梁起重機英語two -beam crane 雙梁起重機double -beam crane 雙梁吊車electric two -beam crane 電動雙梁起重機rock -bolt crane beam 巖錨吊車梁Electric single -beam crane 電動單梁起重機 返回 crane beam