Xuzhou city in the elevator to install the phone company has what

Xuzhou city in the elevator in the telephone company has:

1, Jiangsu Huatong Elevator Telephone Co.

2, Xuzhou City Elevator Telephone Installation and Maintenance Co.

3, Xuzhou City Elevator Telephone Sales Co.

4, Xuzhou City Elevator Telephone Installation Co.

5, Xuzhou City Elevator Telephone Maintenance Co.