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
She went to a school-board meeting.
她去参加联合校董会会议了。
How will we know whether it can have a positive effect on the company?
我们怎么会知道它对公司能有积极的效果呢？
Hello. Can I speak to Eric, please?
喂。请艾瑞克接电话好吗？