将<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/297b8c69a9a04c8281f4b217ebfd95d0.png?x-oss-process=image/sharpen,200"/>面上的抛物线<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/8e70ee673a9e47c59dbd3bfa73cebd2e.png?x-oss-process=image/sharpen,200"/>绕<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/b2cf6bc3d359467f8ef41b774a5c43dc.png?x-oss-process=image/sharpen,200"/>轴旋转一周所得的旋转曲面方程为（）. ‍