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
He ventured to speak to her.
他鼓起勇气向她说话。
Marry your son when you will, your daughter when you .
给儿子娶亲，想在什么时候皆可；把女儿嫁人要在有力量时才行。
Oh, dear! What's wrong?
噢，天哪！怎么啦？