Space frame and lathe: what they have in common

1. Step 1. Space frame — evolved from — Kite. Bell came up with the structure while building tetrahedral kites.
2. Step 2. Kite — has part — Rope. The line holds the kite and passes the tension to the hand.
3. Step 3. Rope — is part of — Lathe. The bowstring wraps around the workpiece and turns it.

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