A.SA越長(zhǎng),越有利刺輥對(duì)纖維層的分梳 B.SA越短,越有利刺輥對(duì)纖維層的分梳 C.SA與刺輥對(duì)纖維層的分梳效果無(wú)關(guān) D.上面三種說(shuō)法都不對(duì)