当前素材是由九二图网为您提供的“Letters and industrial gear”作品，素材编号：20170302090054，尺寸为：3566×2796 像素，大小为：2.8MB，素材关键词要素为：Letters, industrial gears, industrial gears, mechanical gears, rusty gears, parts of machinery, industrial production,industrial production,Modern Technology,Stock Images，欢迎下载收藏！