Ship stabilizer and bellows: what they have in common

1. Step 1. Ship stabilizer — is part of — Ocean liner. Stabilizers.
2. Step 2. Ocean liner — evolved from — Screw steamship. A large steamship.
3. Step 3. Screw steamship — has part — Watt steam engine. A steam engine or turbine.
4. Step 4. Watt steam engine — evolved from — Piston pump. The first steam engines (Newcomen’s) pumped water out of mines by driving pumps.
5. Step 5. Piston pump — has part — Check valve. Check valves direct the flow.
6. Step 6. Check valve — is part of — Bellows. An air intake valve.

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