Three-ring gear transmission is a novel type of planetary transmission with small tooth number difference, which was invented by a Chinese engineer.

三环传动是我国科技人员发明的新型的少齿差行星传动装置。

youdao

The anomaly of tooth number is mostly due to hereditary factors.

遗传因素对牙齿数目异常起主导作用。

youdao

This paper advanced a practical and succinct formula for tooth number choice of involute gear.

从等强度概念出发，推出一个据以选取渐开线齿轮齿数的简单、实用公式。

youdao

Most serious regulation-watchers would say that anyone who buys that number must also believe in the largess of the Tooth Fairy.

FORBES: Good Riddance To Obama's Regulatory Czar

Dental health experts say tooth decay in children remains too high despite latest figures which show a decrease in the number of five-year-olds with problems.

BBC: Tooth decay in children too high, says chief dental officer