Top and bottom halves of a nesting doll and conveyor belt: what they have in common

1. Step 1. Top and bottom halves of a nesting doll — is part of — Matryoshka. Turned parts of the body.
2. Step 2. Matryoshka — uses — Lathe. Turned on a lathe.
3. Step 3. Lathe — has part — Rope. The bowstring wraps around the workpiece and turns it.
4. Step 4. Rope — is used in — Pulley. A rope runs over the pulley.
5. Step 5. Pulley — is part of — Belt drive. The belt wraps around pulleys.
6. Step 6. Belt drive — is used in — Conveyor belt. The belt runs around the drive and tension drums.

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