中国设备管理协会设备交易服务中心冶金工业设备配件服务中心北京中能科信信息技术中心国际钢铁设备采购优质供应商共享大会建立沟通合作桥梁促进信息共享2021.4.21中国·北京会议内容 steel procurement equipment trade industry association fume industrial equipment accessories service center beijing middle energy information technology center international iron and steel equipment procurement high-quality supplier sharing conference establish communication cooperation bridge promote information sharing