Fef
abbr. fast-extrusion furnace 快速喷炉
🗣️ 情景例句
I don't know for sure.
我不太清楚。
Last month was December,wasn't it ?
上个月是十二月，对不对？
It was the idea of supporting a craft on a 'pad',or cushion, of low-pressure air, ringed with a curtain of higher pressure air.
用一个气垫来支撑船体，低压空或软垫，软垫周围用高压空气环绕。