Reference electrode and lathe: what they have in common

1. Step 1. Reference electrode — is part of — pH meter. It provides a stable reference potential.
2. Step 2. pH meter — has part — Amplifier. It amplifies the weak signal of the electrode.
3. Step 3. Amplifier — has part — Triode. Tube amplifiers.
4. Step 4. Triode — is made of — Tungsten. The filament is tungsten.
5. Step 5. Tungsten — is material for — High-speed steel. Tungsten.
6. Step 6. High-speed steel — is used in — Lathe. Cutting tools.

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