Gutta-percha and conveyor belt: what they have in common

1. Step 1. Gutta-percha — is material for — Golf ball. “Gutty” balls were gutta-percha.
2. Step 2. Golf ball — uses — Drag. The dimples reduce drag.
3. Step 3. Drag — is used in — Retractable landing gear. Retracting reduces drag.
4. Step 4. Retractable landing gear — has part — Hydraulic cylinder. Retraction cylinders.
5. Step 5. Hydraulic cylinder — is part of — Tunnel boring machine. Hydraulic cylinders push the machine forward.
6. Step 6. Tunnel boring machine — has part — Conveyor belt. Spoil is removed by a conveyor.

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