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
It's my pleasure.
我很愿意效劳。
The (or A) beggar may sing before the thief (or footbad).
既是穷光蛋，何虑窃贼偷。
Something English? I know - fish and chips!
英国风味？我知道--炸鱼和土豆片！