盛世云商··································封面
盛世云商····································封二
太原吉億達(dá)科技有限公司·······················封三
天津和順達(dá)精密帶鋼有限公司·················封底
第21屆中國國際工業(yè)博覽會···················前彩1
北京時(shí)代貝林機(jī)電設(shè)備有限公司···············前彩2
中國汽車技術(shù)研究中心·······················前彩3
2019華南國際工業(yè)自動化展覽會···············前彩4