中间平面内蜗杆与蜗轮的模数和压力角分别相等，即蜗轮的端面模数等于蜗杆的轴面模数且为标准值；
The worm and worm among plane within the modulus and pressure Angle, namely the worm gear were equivalent modulus is equal to the end of the worm shaft side modulus and for standard;
细高齿齿轮是采用小模数、小压力角、大齿顶高来加大端面重合度，达到提高齿轮强度、降低噪声的目的。
High tooth gear has small module, small pressure Angle, and large addendum to enlarge the transverse contact ratio, improve gear strength, and reduce the noise.
细高齿齿轮是采用小模数、小压力角、大齿顶高来加大端面重合度，达到提高齿轮强度、降低噪声的目的。
High tooth gear has small module, small pressure Angle, and large addendum to enlarge the transverse contact ratio, improve gear strength, and reduce the noise.
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