时，随着转速增加，液位的变化是无限的，液位的上升高度与下降深度恒相等，旋转抛物体与同底同高圆柱体积关系为定值; 当 K>0

时，容器为上大下小的圆筒，旋转抛物面导致的液位变化是有限的，存在的极限值为槡3 +1，当液体旋转角速度超过临界角速度时，旋转

液面分为中部的抛物面和边缘增长的水膜两部分.

wall，the equation is deduced when the slop of the wall is K ( K≠0) . When K→∞ ，the change of liquid

level is infinite with the in- crease of rotating speed，but the rise height of liquid level is

equal to the fall depth of liquid level，and the volume relationship is a constant. when K>0，the

container is a round table with large top and small bottom. The liquid level

change caused by rotating paraboloid is limited，and the limit value is槡3 +1，when the liquid

rotation angular veloci- ty exceeds the critical angular velocity，the rotating liquid surface

is divided into two parts: the paraboloid in the middle and the water film with growing edge.