Panama Canal
device · 1914 · Electric age
A canal with locks between oceans.
What it is made of
- Canal lock — has part. Locks.
- Electric locomotive — has part. Electric “mules” tow the ships through the locks.
Principles and materials it uses
- Concrete — is made of. The locks are concrete.
What it is a kind of
- Canal — is a kind of. A canal.