self operated meaning in English

自动的

Application of self operated control valve
自力式流量控制阀的探讨
The company is mainly engaged in import and export business , self operates and acts as an agent as well for import and export of all kinds of merchandisesand technology , and also deals with importing material for processing , processing according to supplied samples , assembling of supplied parts , and compensation trade , counter trade and entrepot trade
珠海经济特区科赛进出口有限公司是珠海市对外经济贸易委员会批准成立的专业外贸公司。公司以进出口贸易为主，自营和代理各类商品及技术的进出口业务。还经营进料加工三来一补对销贸易和转口贸易。