Saddle tree frame and monitor: what they have in common

1. Step 1. Saddle tree frame — is part of — Saddle. The saddle tree.
2. Step 2. Saddle — is made of — Leather. A saddle is made of leather.
3. Step 3. Leather — is material for — Submarine. It was covered with leather.
4. Step 4. Submarine — has part — Sonar. Underwater acoustics.
5. Step 5. Sonar — works like — Ultrasound scanner. A medical sonar: the same echo principle.
6. Step 6. Ultrasound scanner — has part — Monitor. A screen.

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