Positive SSL
1 如一漸開線齒輪其節徑DP及壓力角θ為已知,則基圓直徑DB等於
A DP×cosθ
B DP×sinθ
C Dp/cosθ
D Dp/sinθ
力線與基圓相切可知Dpcosθ=DB/2 即DB=DPcosθ