5.2 Video 1. 运输途中出问题 http://yzkc.scetop.com/gjmy/wp-content/uploads/sites/20/2021/07/运输途中出问题.mp4 2. 坚果 包装 http://yzkc.scetop.com/gjmy/wp-content/uploads/sites/20/2021/07/坚果-包装.mp4