Thread mandrel1
[机] 螺纹心轴
🧩 词语组成解析
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
Smoking is harmful to your health.
吸烟有害健康。
How far is it from here to the bus stop?
到公共汽车站有多远？
Are you sure?
你肯定吗？