n.压纸卷筒；压盘；滚筒
The machine specially test sponge springiness after pressed by platen. 本机专门测试泡棉试验物经压缩盘压缩后,其弹性度值。
But time for washing of platen washing machine is longer, the price is higher. 但滚筒洗衣机洗涤时间较长，价格较高。
