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
All right. Please hold two orchestra seats for us.
好，请帮我们保留两张前排的座位。
The new play was good and everybody enjoyed it.
新戏很好看并且所有人喜欢它。
Because the equipment for adding sound to films had not yet been developed.
因为给电影配音的设备还没有研制出来。