搜元素提供国外优质的免版权矢量素材资源免费下载，该资源的中文名称是：Blueprint. Vector engineering illustration. Cover, flyer, banner, background. Instrument-making drawings. Mechanical engineering drawing. Technical illustrations，英文名称是：Blueprint. Vector engineering illustration. Cover, flyer, banner, background. Instrument-making drawings. Mechanical engineering drawing. Technical illustrations，该资源由网友上传，提供高速下载。
