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我在尝试
lp -o 饱和度=0 -o /文件/路径
这是一个彩色的 pdf 文件,我想要它的黑白打印输出。为什么我仍然得到彩色打印出来?我错在哪里?
我的打印机是:HP Deskjet Ink Advantage 1515