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
We couldn't afford it.
我们当时不够钱。
There's too much static.
干扰太大。
No sweater?
没穿毛衣？