Stationary tubesheet
[化] 固定管板
🧩 词语组成解析
[化] 管板
🗣️ 情景例句
The communists don't believe in God or ghosts.
共产主义者不相信鬼神。
I didn't notice you were wearing your new hat.
我没注意你戴了新帽子。
It was upon this principle that the first instruments were made,
据这一原理，制造出了最初的地震仪器，