Spinning
Yarn Spinning
noun, verbal noun
A spinning achievement is just the spinning you produce — like thread or yarn spinning.
紡績 is a technical term that specifically refers to the process of spinning fibers into yarn or thread, typically in the textile industry.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
牽切紡績とは、化学繊維特有の紡績方法で、綿からの紡績ではありません。
Kensetsu bouseki is a spinning method particular to synthetic fibers not spun from cotton.