内小齿轮 meaning in Chinese

internal pinion

Geometrical design of cylindrical internal involute gear pairs ; diagrams for geometrical limits of internal gear - pinion matings
渐开线啮合圆柱内齿轮副的几何设计:内小齿轮配合的几
Geometrical design of cylindrical internal involute gear pairs ; diagrams for limits of internal gear - pinion type cutter matings
渐开线啮合圆柱内齿轮副的几何设计.内小齿轮刀具配合