… 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 … slides for microscopic study. (8) Models of towns, public monuments, houses, etc. (of plaster, paperboard, …