Root diameter
[机] 齿根直径, 螺旋纹底直径
🧩 词语组成解析
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
His house was always neat.
他家经常都是干净的。
Never judge by appearances.
人不可貌相。
One minute and twelve seconds.
1分12秒。