求翻译：国内营销中心全面负责各食品企业的国内销售业务，产品生产供应来源为正大集团农牧食品事业（中国）各食品生产企业，主要包括青岛正大有限公司、黑龙江正大实业有限公司、吉林德大有限公司、北京大发正大有限公司、香河正大有限公司、洛阳正大食品有限公司、秦皇岛正大有限公司、正怀来双大食品有限公司、牡丹江正大实业有限公司、大食品企业（上海）有限公司、正大食品企业（青岛）有限公司、正大食品企业（成都）有限公司等。是什么意思？

Domestic Marketing Center is fully responsible for the domestic sales of food companies, the production source of supply for the Chia Tai Group, pastoral food business (China), food production companies, including the Qingdao Chia Tai Co., Ltd., Heilongjiang Chia Tai Industrial Co., Ltd., Jilin Deda

Domestic marketing center is responsible for the food industry's domestic sales business, producing sources of supply for agricultural food products group (China) cause the production of food, including Qingdao Enterprises Co. , Ltd. , techno Co. , Ltd. , have poured in Heilongjiang, Jilin, Co. , Lt