The relevant personnel gradually meet the professional standards in the field of airport construction in a certain period of time, become specialized in this profession and obtain the corresponding professional status.
Refers to a certain period of time, the relevant personnel gradually meet the professional standards in the field of airport construction, become specialized in this profession and obtain the corres ponding professional status.
Refers to a certain period of time, the relevant personnel gradually meet the professional standards in the field of airport construction, become specialized in this profession and obtain the corres ponding professional status.