Surfboard stringer and transformer: what they have in common

1. Step 1. Surfboard stringer — is part of — Surfboard. A longitudinal stiffening batten.
2. Step 2. Surfboard — is made of — Fibreglass. Fibreglass.
3. Step 3. Fibreglass — is material for — Motherboard. The board is fibreglass laminate.
4. Step 4. Motherboard — is part of — Personal computer. The main board.
5. Step 5. Personal computer — has part — Power supply. The power supply turns mains power into the voltages the board and drives need.
6. Step 6. Power supply — has part — Transformer. A transformer.

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