How to state or correct the defects pointed out by the examiner in the preliminary examination of utility model patent application?

You can find reference books (such as industry standards) to explain the modification of small round steel. Regarding the angle, if it is clearly indicated in the attached drawings of your instructions, you can answer it according to this article and common sense. The expression of adhesive tape can simply state your point of view directly. I hope I can help you! Wish you success!