Companies were all assigned a numerical Standard Industrial Classification (SIC) code (now North American industry Classification System, or NAICS) identifying which industry sector they fit in to.
每个企业都会有一个标准产业代码(SIC)(现为北美产业分类系统，简称NAICS)，用来确定各自属于哪个产业部门。
In the national economy industry classification, conference and exhibition service code for 7491, belonging to "other business services" category.
在国民经济行业分类中，会议及展览服务的代码为7491，归属“其它商务服务”类。
In the national economy industry classification, conference and exhibition service code for 7491, belonging to "other business services" category.
在国民经济行业分类中，会议及展览服务的代码为7491，归属“其它商务服务”类。
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