The ortho cone helicoid was used interrsect intercept by the ortho cone helicoid and the cylinder.正圆锥螺旋面是正圆柱螺旋面被同轴正圆锥面截得.The surface obtained when every point on the edge generates an involute is called helicoid.表面获得了在边缘...
他把个人回忆录与英国电视的故事紧密结合在一起。He intertwines personal reminiscences with the story of British television.他们认为电视的问世将使观众涌向影院的现象不复存在。They thought the arrival of television would deal a death blow to mass cinema audiences.电视的出现沉重地打...