Bimetallic(spring cone) seal
[化] 双金属密封
🧩 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
If only we could bottle the fresh air.
要是我们能用瓶子将新鲜空气装回去多好。
He works best who knows his trade.
内行的人做他的事一定会做得最好。
Have you received a letter from Jim yet?
你收到了吉姆的来信没有？