Hall sensor and oil well: what they have in common

1. Step 1. Hall sensor — is part of — Anti-lock braking system (ABS). Sensors measure the wheel speed.
2. Step 2. Anti-lock braking system (ABS) — evolved from — Air brake. Anti-skid systems first appeared in aviation and on railways.
3. Step 3. Air brake — is part of — Diesel locomotive. Air brakes.
4. Step 4. Diesel locomotive — has part — Diesel engine. The diesel turns a generator.
5. Step 5. Diesel engine — is part of — Drilling rig. The drive.
6. Step 6. Drilling rig — is used in — Oil well. A well is drilled by a rig.

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