Egg beater and micrometer: what they have in common

1. Step 1. Egg beater — is made of — Stainless steel. A whisk is stainless steel so it does not rust.
2. Step 2. Stainless steel — is material for — Vernier caliper. Stainless steel.
3. Step 3. Vernier caliper — evolved into — Micrometer. A more precise instrument.

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