Bowling pinsetter and shaduf: what they have in common

1. Step 1. Bowling pinsetter — has part — Conveyor belt. Returning the balls.
2. Step 2. Conveyor belt — is part of — Tunnel boring machine. Spoil is removed by a conveyor.
3. Step 3. Tunnel boring machine — has part — Hydraulic cylinder. Hydraulic cylinders push the machine forward.
4. Step 4. Hydraulic cylinder — is part of — Forklift. Lifting the forks.
5. Step 5. Forklift — uses — Counterweight. A counterweight.
6. Step 6. Counterweight — is used in — Shaduf. The counterweight makes lifting the bucket easier.

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