volumetric feed的用法和樣例：
例句
- Feed roller weighting not acting properly.
喂入羅拉加壓未完全起作用。 - Whenever a knop is to be formed,the feed speed of decorative yarn with increase,so that certain length of yarn that is enough to form the knop can be supplied.
該方法是保持芯紗的運動速度恆定不變，讓飾紗按要求改變運動速度，在需要形成結子時提高飾紗的喂入速度，以滿足形成結子所需的用紗量。
