Damascus steel and tunnelling shield: what they have in common

1. Step 1. Damascus steel — is material for — Sword. Damascus blades.
2. Step 2. Sword — has part — Handle. A handle.
3. Step 3. Handle — is part of — Chisel. A wooden or plastic handle.
4. Step 4. Chisel — is used in — Tunnel. Hezekiah’s Tunnel was cut by hand with chisels.
5. Step 5. Tunnel — uses — Tunnelling shield. Shield tunnelling.

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