Knurls
辊式拉边器
🗣️ 情景例句
Keep it down!
小点儿声！
I wasn't born yesterday.
我又不是三岁小孩。
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。