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
I was in the neighborhood, so I thought I'd stop by.
我就住在附近，所以我想拜访一下。
When the tree is fallen, every one runs to it with his axe.
大树一倒下，人人持斧来。
IS it true or false?
这是对的还是错的？