Wok and internal combustion engine: what they have in common

1. Step 1. Wok — is made of — Cast iron. Woks are cast iron.
2. Step 2. Cast iron — is material for — Steam hammer. Nasmyth’s hammer is cast iron.
3. Step 3. Steam hammer — has part — Cylinder. A steam cylinder.
4. Step 4. Cylinder — is part of — Internal combustion engine. Combustion takes place in the cylinders.

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