Ironing board top and laser: what they have in common

1. Step 1. Ironing board top — is part of — Ironing board. A perforated board.
2. Step 2. Ironing board — is used in — Electric iron. Ironing.
3. Step 3. Electric iron — has part — Thermostat. A thermostat.
4. Step 4. Thermostat — is used in — PCR. A thermal cycler changes the temperature in cycles.
5. Step 5. PCR — is used in — DNA sequencing. Preparing samples.
6. Step 6. DNA sequencing — uses — Laser. Fluorescent sequencing.

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