1.Involute toothing gears.

1.(Horology.

2.Finally, the tumor enters its final, shrunken state (called the involuted phase), after which it will never regrow.

2.最后，瘤的衰退进入它最后阶段，缩小阶段（叫做退阶段），在这之后，就不继续生长。

3.Mould design of PU hydroclone by involute feeding is introduced.Practice proves,this mould structure is reasonable and the product is took out expediently,it gains marked economic benefits.

3.介绍了渐料旋流器进料体模具的设计,实践证明,此模具结构合理,脱模方便,有一定的经济价值。