card fettlings;fettling waste是什么意思

用法例句

From the special experiment of card stripping on the metallic clothing carding machine,by researching the law of variation before and after card stripping on different moment we haveobtained the result which indicates that metallic clothing also need card stripping and the properperiod of card stripping is once every two days.

通过在金属针布梳棉机上专门的抄针实验，研究抄针前后不同时刻的棉结粒数的变化规律。