应该为数据表标识行标头和列标头。
在供产品均采用国标、行标或企标组织生产。
For the products are used in the national standard, line marked, or enterprise standard to organize production.
对付含有两个或更多个逻辑级别的行标头和列标头的数据表,应该利用标记来关联干系数据单位格和标头单位格。
Markup shall be used to associate data cells and header cells for data tables that have two or more logical levels of row or column headers.
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