gap between teeth 牙缝儿 ; 牙缝 ; 齿缝
By working slowly from both sites, you can nearly close the gap between the two teeth, but don't make it disappear completely, that would look again unnatural.
两边都这样慢慢处理，你几乎可以缝合牙间的缝隙，但也不要让它们完全消失掉了，那又会看起来很不自然。
As the gap of teeth of internal matins gears with small tooth number difference is small, several teeth will mate simultaneously after the teeth are deformed by load.
渐开线少齿差齿轮副，由于是内啮合，齿轮副的齿对之间的间隙很小，在受力后轮齿变形而使得同时有多对齿啮合。
In small tooth difference of inner meshed transmission, there were a few pairs of tooth faces which were apart from each other for a small gap beside the contact point generated by two meshed teeth.
在少齿差内啮合传动中，存在多对接近啮合的小间隙齿面于理论啮合点左右，轮齿受力产生的微小变形使得某些对齿面相互接触进入啮合状态。
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