Mechanical seal
[化] 机械密封; 端面密封
🧩 词语组成解析
seal
[sil]
n. 密封;印章;海豹;封条;
v. 密封;盖章;决定;封上（信封）;
🗣️ 情景例句
The two sistes are very much alike.
这两姐妹长得非常相像。
Obedience is the first duty of a soldier.
服从是军人的第一职责。
Well, of course, I know that gentlemen like you carry only large notes.
当然喽，我知道像你这样的先生是只带大票子的。