Concave cutter
[机] 凹面铣刀
🧩 词语组成解析
concave
['kɔn'keiv]
n. 凹面，成凹形;
adj. 凹的;
vt. 使成凹形;
🗣️ 情景例句
Ready, folks?
可以点菜了吗？ 两位，
The flight is delayed.
飞机晚点起飞。
NASA is now going to put the telescope right,
国家航天局准备纠正这一错误，