Electric drill and nuclear reactor: what they have in common

1. Step 1. Electric drill — works like — Dental drill. The same task — spinning a drill bit; the foot-powered dental drill appeared before the electric drill.
2. Step 2. Dental drill — has part — Turbine. An air-driven turbine handpiece.
3. Step 3. Turbine — includes — Steam turbine. A kind of turbine.
4. Step 4. Steam turbine — is part of — Nuclear power plant. Steam turns the turbines — as at a thermal station.
5. Step 5. Nuclear power plant — has part — Nuclear reactor. The reactor heats the coolant.

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