Thread root diameter
[化] 螺纹内径; 螺纹底径
🧩 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）;
root
[rut]
n. 根，根源;原因，本质;祖先;[乐]和弦基音;
vt. 使生根;使固定;根源在于;欢呼，喝彩;
vi. 生根;根除;
🗣️ 情景例句
I enjoyed reading these books very much.
我很喜欢读这些书。
This kind of box is not suitable for the transport of the tea sets by sea.
这种箱子不适合装茶具海运。
If you have any questions on the details， feel free to ask.
如果对某些细节有意见的话，请提出来。