求翻译：株洲拥有多家大型轨道交通生产制造型企业，主要生产以电力机车、城轨、地铁、铁路货车、道岔、铁路电气系统、工程机械等大型轨道交通设备。是什么意思？

Zhuzhou has a large number of rail transportation manufacturing companies, mainly the production of transportation equipment, electric locomotives, city rail, subway, railway wagons, turnouts, railway electrical systems, construction machinery and other large orbit.

Zhuzhou has many of the largest rail transportation manufacturing enterprises, the main production to electric locomotive, the City rail, metro, railway wagons, trains depart, the railway electrical system, engineering machinery, large rail transportation equipment.

Zhuzhou has many large-scale orbital transportation manufacturing enterprise, main production by electric locomotive, city axle, subway, goods wagon, rail switch, railroad electrical system, project machinery and so on large-scale orbital transportation equipment.

Zhuzhou has a number of large rail manufacturing enterprises, mainly production of electric locomotives, railway freight cars, subway, city rail, turnouts, railway electrical systems, machinery and other large rail transit equipment.

Zhuzhou has many of the largest rail transportation manufacturing enterprises, the main production to electric locomotive, the City rail, metro, railway wagons, trains depart, railway electrical system, engineering machinery, large rail transportation equipment. ;