many engineering pairs such as the wheel-and-rail combination described in section 8. 2. 1 generate elliptical contact areas . 工程上的許多運動組合,諸如821節(jié)中所描述的車輪與鋼軌組合,都產生橢圓接觸面。
many engineering pairs such as the wheel-and-rail combination described in section 8.2 . 1 generate elliptical contact areas 工程上的許多運動組合,諸如821節(jié)中所描述的車輪與鋼軌組合,都產生橢圓接觸面。