Caliper beam and pneumatic tube: what they have in common

1. Step 1. Caliper beam — is part of — Vernier caliper. The main scale.
2. Step 2. Vernier caliper — is made of — Stainless steel. Stainless steel.
3. Step 3. Stainless steel — is material for — Water-jet propulsion. The impeller is stainless steel.
4. Step 4. Water-jet propulsion — has part — Impeller. An impeller.
5. Step 5. Impeller — is part of — Compressor. A centrifugal compressor is an impeller.
6. Step 6. Compressor — is part of — Pneumatic tube. A pressure or vacuum blower.

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