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 scheme is well worth a try.
这个计划倒值得一试。
Even the walls have ears.
隔墙有耳。
There are some in the cupboard.
碗橱里有几只。