Treadmill and turbine: what they have in common

1. Step 1. Treadmill — has part — Conveyor belt. A belt.
2. Step 2. Conveyor belt — uses — Belt drive. The belt runs around the drive and tension drums.
3. Step 3. Belt drive — is part of — Drill press. A belt turns the spindle.
4. Step 4. Drill press — works like — Electric drill. A drill press and a hand drill do the same — spin a bit — but the press is fixed to a bench.
5. Step 5. Electric drill — works like — Dental drill. The same task — spinning a drill bit; the foot-powered dental drill appeared before the electric drill.
6. Step 6. Dental drill — has part — Turbine. An air-driven turbine handpiece.

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