Universal Serial Bus Device Class Definition for Printing Devices 下载 ztf688 14 0 PDF 2020-08-20 08:08:24 as the title. one class of usb. happy new year 立即下载 微信扫一扫:分享 微信里点“发现”,扫一下 二维码便可将本文分享至朋友圈。