v. 2. Atmosphere-Cable television
v. 3. Cable travel-Cotton
v. 5. Electric motor-Friction
v. 6. Fuel cell-Immune system
v. 7. Induction-Magnetism
v. 8. Mapmaking-Mining and quarrying
v. 9. Missile and torpedo-Oil exploration and refining
v. 10. Optics-Plant kingdom
v. 11. Plasma physics-Radiotherapy
v. 12. Railroad system-Seismology
v. 13. Semiconductor-Sports
v. 14. Spring-Thermography
v. 15. Thermometer-Virus biological
v. 16. Virus, computer-Zoology
