In spinning, the front set rotates about 30 times faster than the back set.This difference in speed attenuates the yarn and makes it even, smooth and uniform.是什么意思_In spinning, the front set rotates about 30 times faster than the back set.This difference in speed attenuates the yarn and makes it even, smooth and uniform.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句