Nano-imprint lithography and pick out the paper roller coating dental pad of paper, after surface treatments and wear-resistant overuse, and pick out the paper teeth and radiograph to replace it.

• 压印和传纸滚筒上的叼纸牙垫涂层，经过暗不天粗化办理而耐磨不暂用，且叼纸牙和牙片可成群调换。