direct traffic control

signalling block system

en-US/daɪˈɹɛkt ˈtɹæfɪk kənˈtɹoʊl/
en-GB/daɪˈɹɛkt ˈtɹæfɪk kənˈtɹəʊl/

دسته بندی ها:

signalling block system