1. This paper reflects the author's solid theoretical foundation, systematic professional knowledge and good scientific research ability in this subject. It meets the requirements of master's degree thesis, and it is suggested to arrange a defense.

2. The paper is rich in content, clear in organization and complete in structure, especially the application of CAD technology to assist the variant design of products and the repeated modification of design scheme during the design process. This article is an excellent doctoral thesis, and it is recommended to submit a defense.

3. This paper is correct in topic selection, reasonable in structure, rich in content, sufficient in data and materials, advanced in analysis method, reasonable in writing progress, and the conclusions and suggestions have regional practical significance. The recommendation is an excellent graduation thesis at the university level.

4. The format of the paper is correct, the structure is rigorous, the levels are distinct, the writing is standardized, the logic is strict, the language is fluent, and the focus is prominent, which shows that the author has strong independent scientific research ability. The thesis is excellent in general, and I agree to submit a defense, suggesting that I be awarded a master's degree in agriculture.

5. The writing idea of the paper is clear, the language is fluent and concise, the level is clear, the logic is strong, the words are accurate, all kinds of data and charts are complete and standardized, and the literature citation is correct and scientific. This shows that this student has a certain theoretical foundation and scientific research ability.

6. The language expression is fluent, and the format fully meets the specification requirements; Rich references and strong timeliness; There is no plagiarism.