1. Material selection, manufacturing processes, and design adaptations for producing bookshelf supports in varying quantities. Keywords: `material selection`, `manufacturing`, `batch production`.

2. Importance of modeling in product design and development, focusing on visualization, prototyping, and iterative improvements. Keywords: `design modeling`, `product development`, `prototyping`.

3. Comparative analysis of materials (wood, metal, plastic) for garden tables with emphasis on aesthetics, physical properties, manufacturing, cost, and maintenance. Keywords: `material comparison`, `garden furniture`, `sustainability`.

4. Application of photoelasticity and strain gauges in testing materials and prototypes, with examples of torsional strength and product safety measures. Keywords: `photoelasticity`, `strain gauge`, `torsional strength`, `safety testing`.

5. Role of graphic drawing techniques (orthographic projection, cut-away, exploded, perspective drawings) in engineering and product design. Keywords: `technical drawing`, `orthographic projection`, `exploded view`.

6. Mechanism design for motion transfer and locus plotting, including gears, linkages, and rotational constraints. Keywords: `mechanism design`, `motion transfer`, `locus plotting`.

7. Design and development of products such as:
- Sauce or dip holders for circular restaurant tables ensuring accessibility and refill functionality.
- Recyclable waste collection containers for children with batch manufacturability and interactive features.
- Packaging solutions for tree saplings including secure holding, compost compatibility, and visible display. Keywords: `product design`, `interactive containers`, `packaging design`.