The catering trade was regarded as the most important service trade in ancient times.
饮食服务业可谓古代社会最重要的服务行业。
参考来源 - 南宋临安饮食服务业研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Note: Hoteing and catering trade statistics only include the catering trade, before 2004.
注：2004年以前，住宿及餐饮业统计数据仅包含餐饮业。
Cesspits and cesspools shall be available in the catering trade not within the service sectors of drainage network.
在排水管网服务区外的饮食业应当设污水池或化粪池。
Developing natural gas utilization in the catering trade, gas air conditioning, gas vehicle, power generation, peripheric natural market is discussed.
分析了天然气在餐饮业、燃气空调、燃气汽车、发电、周边天然气市场等方面拓展的前景。
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