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
Philip had to go back to the hospital. Philip
必须要回医院。
Do not swap horses when crossing a stream.
处在危难中，不宜大更动。
My wife wants go to Egypt.I'd like to there, too.
我妻子想到埃及去，我也想去那儿。