Decision No. 143/2001/QD-TCBD dated February 28, 2001 of the General Department of Post and Telecommunications promulgating the regulation on control of quality of the post and telecommunications services and networks
Decision No. 143/2001/QD-TCBD dated February 28, 2001 of the General Department of Post and Telecommunications promulgating the regulation on control of quality of the post and telecommunications services and networks
