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| Packaging (3) |
| Polytechnic University of Puerto Rico--Graduate students--Posters (3) |
| Polytechnic University of Puerto Rico--Graduate students--Research (3) |
| Six sigma (Quality control standard) (3) |
| Medical instruments and apparatus industry (1) |
| Pharmaceutical industry (1) |
| Quality control--Optical methods (1) |
| Waste minimization (1) |