3D printer and electrical grid: what they have in common

1. Step 1. 3D printer — has part — Servomotor. Stepper motors.
2. Step 2. Servomotor — is part of — Exoskeleton. Joint actuators.
3. Step 3. Exoskeleton — has part — Lithium-ion battery. A battery.
4. Step 4. Lithium-ion battery — is part of — Grid battery storage. Lithium-ion modules.
5. Step 5. Grid battery storage — is part of — Electrical grid. Storage balances the grid.

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