Two yo-yo halves and lathe: what they have in common
Step 1.
Two yo-yo halves
— is part of —
Yo-yo
. Flywheel discs.
Step 2.
Yo-yo
— has part —
Rope
. A thread.
Step 3.
Rope
— is part of —
Lathe
. The bowstring wraps around the workpiece and turns it.
Open Evothings