Milling machine knee and elevator: what they have in common

1. Step 1. Milling machine knee — is part of — Milling machine. A lifting support for the table.
2. Step 2. Milling machine — has part — Gear. A gear train drives the feed.
3. Step 3. Gear — is part of — Tide-predicting machine. Gear wheels set the harmonics.
4. Step 4. Tide-predicting machine — has part — Pulley. Pulleys add up the harmonics.
5. Step 5. Pulley — is part of — Elevator. The rope runs over a pulley.

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