picking thread mechanism的用法和樣例：
例句
- A traversing mechanism winds the strand on to the forming cake.
有一個排線機構把原絲卷繞在成形絲餅上。 - The working principle of computerized embroidery machines was introduced in brief and tread taking-up mechanism and needle driving mechanism were the major research objects.
摘要以電腦繡花機刺布機構和挑線機構為研究對象，簡要介紹其工作原理，著重對各機構進行運動分析。
