Wooden post and r-7 rocket: what they have in common

1. Step 1. Wooden post — is part of — Shaduf. The post is the fulcrum of the lever.
2. Step 2. Shaduf — is used in — Well. Or with a well sweep.
3. Step 3. Well — uses — Rope. Water was raised with a bucket on a rope.
4. Step 4. Rope — is part of — Parachute. The lines are ropes.
5. Step 5. Parachute — is part of — Soyuz. Landing by parachute.
6. Step 6. Soyuz — evolved from — R-7 rocket. The Soyuz rocket belongs to the R-7 family.

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