Inner glass tube and screw press: what they have in common

1. Step 1. Inner glass tube — is part of — Liebig condenser. Steam flows through it.
2. Step 2. Liebig condenser — works like — Separate condenser. Condensing vapour by cooling.
3. Step 3. Separate condenser — is part of — Watt steam engine. Watt’s main invention.
4. Step 4. Watt steam engine — is part of — Rotary printing press. The first rotary presses were steam-driven.
5. Step 5. Rotary printing press — evolved from — Gutenberg printing press. Cylinders instead of a flat press.
6. Step 6. Gutenberg printing press — has part — Screw press. Gutenberg adapted the screw press known from pressing grapes.

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