… apparatus and models, designed for demonstrational purposes (for example, in education or exhibitions), …
Explanatory notes
… apparatus and models, designed for demonstrational purposes (for example, in education or exhibitions), … apparatus and models designed for demonstrational purposes (e.g., in schools, lecture rooms, exhibitions) and … etc.) generally of metal or wood (e.g., for advertising purposes, etc.). It should, however, be noted that models …