Cryogenics and sickle: what they have in common

1. Step 1. Cryogenics — is used in — Liquefied natural gas. Liquefaction.
2. Step 2. Liquefied natural gas — is used in — LNG carrier. It carries LNG.
3. Step 3. LNG carrier — is a kind of — Tanker. A tanker.
4. Step 4. Tanker — has part — Diesel engine. A diesel.
5. Step 5. Diesel engine — is part of — Combine harvester. Self-propelled combines run on diesels.
6. Step 6. Combine harvester — evolved from — Sickle. The machine replaced reaping by hand.

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