straight toothed ur gear 直齿圆柱齿轮

helical- ur gear 斜齿圆柱齿轮

standard ur gear 标准直齿轮

equivalent ur gear 当量齿轮

ur gear operated 正齿轮传动

helical-ur gear 斜齿圆柱齿轮

helical ur gear 斜齿圆柱齿轮

tandard ur gear 标准直齿轮

involute ur gear 渐开线正齿轮