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GB/T 18348-2022商品条码条码符号印制质量的检验Bar code for commodity—Bar code symbol print quality verifica...2022-10-26

GB/T 23832-2009商品条码.服务关系编码与条码表示Bar code for commodity - Numbering and symbol marking of servi...2022-06-10

GB/T 23833-2009商品条码.资产编码与条码表示Bar code for commodity - Numbering and symbol marking of assets...2022-06-08

GB/T 18127-2009商品条码.物流单元编码与条码表示Bar code for commodity - Numbering and symbol marking of logis...2022-06-06

基于系统动力学的住宅价格预测研究2020-08-31