horizontal single-cylinder steam engine, wood engraving, published in 1880 - 知識財產 幅插畫檔、美工圖案、卡通及圖標蒸汽, 工業革命, 蒸氣動力車
intellectual property related design with line icons. licence, law, document, project. - 知識財產 幅插畫檔、美工圖案、卡通及圖標矢量圖
innovation ecosystem line vector icon set. pixel perfect. editable stroke. stock illustration. icon symbol, network, organization, environment - 知識財產 幅插畫檔、美工圖案、卡通及圖標圖示, 線圖示
juneteenth. freedom day. june 19. holiday concept. template for background, banner, card, poster. vector illustration - 知識財產 幅插畫檔、美工圖案、卡通及圖標慶祝, 警覺, 黑色
businesswoman owner standing with light bulb idea locked with padlock for patents. intellectual property, patented protection, copyright reserved or product trademark that cannot copy concept, - 知識財產 幅插畫檔、美工圖案、卡通及圖標登記簿, 矢量圖