盛世云商··································封面
盛世云商····································封二
太原吉亿达科技有限公司·······················封三
天津和顺达精密带钢有限公司·················封底
第21届中国国际工业博览会···················前彩1
北京时代贝林机电设备有限公司···············前彩2
中国汽车技术研究中心·······················前彩3
2019华南国际工业自动化展览会···············前彩4