watermarking dandy roll 基本例句 水印辊 The traditional formation tool on older slow-speed machines was the dandy roll.在老式传统的纸机上应用的成型工具是水印辊。 At the ingoing side, there is compression of the sheet between the dandy and the wire.在旋转方向内侧，水印辊和网子中间的湿纸页受到一定的挤压作用。