Trapezidal thread
[机] 梯形螺纹
🧩 词语组成解析
[机] 梯形的
thread
[θrɛd]
n. 线;线索;线状物;螺纹;
vt. 穿成串;将（针、线等）穿过…;用…线缝;给…装入（胶片、狭带、绳子）;
🗣️ 情景例句
Long time no see.
好久不见。
Children and fools cannot lie.
孩子和傻子，不会说谎话。
However, he had at last been allowed to send a fax in which he informed the editor that the he had been arrested while counting the 1,084 steps leading to the fifteen-foot wall which surrounded the president's palace.
不过，他终于获准发回了一份传真。在传真中他告诉编辑，就在他数通向15英尺高的总统府围墙的1，084级台阶时，被抓了起来。