Frictionometer
摩擦系数测定器; 摩擦系数测定仪
🗣️ 情景例句
Eleven o'clock, approve the sketches for the toy spaceship.
十一点钟， 批示玩具太空船的草图。
Here is our contract.
这是我们的合同。
When I got to the theatre I found that they had sold all the tickets.
我到剧院时，发现所有的票都售完了。