plyn.一层；一股；厚度；褶v.定期往返；辛勤地做，不断做；不断供应；使胶合Plyutsinskiy普柳钦斯基plyalectasis[医] 涎管扩张ply-rating线网层率ply turn-up见flipperPlyushchevski普柳谢夫斯基Ply Yarn Twist股线捻度plyoxometalate多金属氧酸盐ply separation分离层层析plysteer force帘布层转向效应力Plysaccharides多糖