主体运营商 meaning in Chinese

incumbent operators

As one of the incumbent operators in the fixed telecom field , china netcom will conscientiously observe and implement the sectoral laws and regulations and the relevant policies of the state , and follow the guidance of the competent authorities like the ministry of information industry
? ?作为国家固定电信领域的主体运营商之一，中国网通集团将自觉地遵守和执行国家通信行业法律、法规和有关政策，坚决服从信息产业部等主管部门的行业管理和业务指导。