Tissue paper plies and elevator: what they have in common

1. Step 1. Tissue paper plies — is part of — Paper tissues. Two or three layers of thin paper.
2. Step 2. Paper tissues — is made of — Wood pulp. Cellulose.
3. Step 3. Wood pulp — is used in — Paper machine. The raw material.
4. Step 4. Paper machine — has part — Belt drive. The wire moves on belts and rolls.
5. Step 5. Belt drive — has part — Pulley. The belt wraps around pulleys.
6. Step 6. Pulley — is part of — Elevator. The rope runs over a pulley.

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