内啮合渐开线齿轮泵
Internal involute gear pump
齿轮渐开线及螺旋角测量仪
involute and helix measuring instrument
渐开线齿轮传动
involute gear transmission
渐开线齿轮的干涉
interference of involute gears
渐开线齿轮铣刀
involute gear milling cutter
involute gear cutter
圆柱渐开线齿轮
cylindrical involute gear
风叶轮渐开线
fan impeller involute’s lineament