Rackwork
齿条, 齿条加工, 齿条机构
🗣️ 情景例句
The sketches for the cover of the new doll book?
是新玩具书的封面设计吗？
The data confirm that this product is safe and effective.
数据证实此种产品安全有效。
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。