Pre-tr tube
[电] 预-TR管
🧩 词语组成解析
abbr. 炼油工程师（Petroleum Refining Engineer）
[计] 磁带记录器, 磁道, 磁带驻留, 故障报告
🗣️ 情景例句
Please fill it out completely.
请全部填写。
The more a man knows, the more he is inclined to be modest.
大智若愚。
Where are you travelling to, Gary?
卡里，你打算旅行到哪里呢？