Electromagnetic force is uniform in circumferential and flow like vortex. 電磁力在橫截面周向上分布均勻，流動(dòng)呈渦旋狀。
The device can unload circumferential force and transmit axle force and movement. 能實(shí)現(xiàn)周向卸荷的軸向力與運(yùn)動(dòng)的傳遞裝置；
The formula for calculating the rolling friction factor was developed and established. Based on the analysis of central force action, the formula for circumferential force action is developed. 在完成中心動(dòng)力作用下的摩擦系數(shù)計(jì)算公式后，繼續(xù)用計(jì)算法確定周動(dòng)力作用下的滾動(dòng)摩擦系數(shù)。