根据延伸外摆线准双曲面齿轮的特点，提出一种精确计算其分度锥面几何参数的新方法。
According to the feature of epicycloid hypoid gear, a new method is proposed to calculate the geometric parameters of pitch cone accurately.
双摆线齿轮减速器是应用外摆线内等距曲线作为齿轮齿廓曲线的一种新产品。
The double cycloid gear reducer is a kind of new product which applies external cycloid internal equidistant curve as the curve of gear flank profile, It is characterized by;
今天最常用的旋转泵是外齿轮泵、内齿轮泵、摆线转子泵、滑动叶片泵和螺旋泵。每种类型的泵都有优点，适合于特定场合的应用。
The most common rotary-pump designs used today are spur-gear, generated-rotary, sliding-vane, and screw pump, each type has advantages that make it the most suitable for a given application.
今天最常用的旋转泵是外齿轮泵、内齿轮泵、摆线转子泵、滑动叶片泵和螺旋泵。每种类型的泵都有优点，适合于特定场合的应用。
The most common rotary-pump designs used today are spur-gear, generated-rotary, sliding-vane, and screw pump, each type has advantages that make it the most suitable for a given application.
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