杨金雄

Pricing method and device, order processing method and electronic commerce system

郭列, 胡涛, 谢俊, 2013 .

Tobacco block spiral conveying and moisture regaining loosening machine

徐源宏, 李攀, 张滨, 2011 .

Device for cutting cigarette bag

王晓冬, 李新云, 杨金雄, 2008 .