Bulbous bow and micrometer: what they have in common

1. Step 1. Bulbous bow — uses — Drag. It reduces wave resistance.
2. Step 2. Drag — is used in — Retractable landing gear. Retracting reduces drag.
3. Step 3. Retractable landing gear — has part — Hydraulic cylinder. Retraction cylinders.
4. Step 4. Hydraulic cylinder — is part of — Jack. A working cylinder.
5. Step 5. Jack — uses — Screw. A screw jack.
6. Step 6. Screw — is used in — Micrometer. A precise screw with a 0.5 mm pitch.

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