建立了砂轮的球基渐开螺旋面方程和分度球面螺旋线方程,给出螺旋运动参数、螺旋线导程.The mechanism of grinding internal gear of spherical worm emery - wheel is researched.正圆锥螺旋面是正圆柱螺旋面被同轴正圆锥面截得.The ortho cone helicoid was used interrsect intercept by the ortho con...
She sails beautifully in winds over 60 knots.它扬着帆以超过60节的船速乘风破浪。...a beautifully sculptured bronze horse.精美的铜马雕塑By supercar standards, though, it is not extravagantly priced for a beautifully engineered machine.然而以豪华跑车的标准...
The purpose of oil refinery is to refine crude petroleum.炼油厂的主要工作是提炼原油.The oil is carried to the oil refinery by pipelines.石油通过输油管输送到炼油厂.The pipeline links the refinery with the port.管道将炼油厂与港口连接起来....