Orificemeter
锐孔流速计, 测流孔
🗣️ 情景例句
What classes are mandatory for your major?
你的专业什么课是必修的？
OK.
好的。
The latest exhibitions, films, or plays are only a short bus ride away.
坐公共汽车几站路，就可看到最新的展览、电影、戏剧。