1) Retiary fibers, excretive articles and host cell with the ball cyst.

2) Retiary fibers, excretive articles and host cell with the ball villi were seen on the inner side of the cyst.

3) A non- wrinkling limited graph for spherical surface parts of retiary metal sheet and metal sheet is obtained.

4) This paper discusses the methods to control the construction quality of retiary white road surface and points out some idiographic measures preventing quality common fault.

5) The simulation results show that the spherical surface parts formed with retiary metal sheet is not prone to wrinkle under the same condition, and better quality parts can be acquired.