Shackle and screw press: what they have in common

1. Step 1. Shackle — is part of — Micrometer. A rigid frame.
2. Step 2. Micrometer — uses — Screw. A precise screw with a 0.5 mm pitch.
3. Step 3. Screw — is used in — Screw press. The force is produced by turning a screw.

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