What pneumatic tube is made of
Delivering capsules through pipes by air pressure.
- Pneumatic tube pipe — has part. A network of tubes between stations.
- Capsule — has part. A container for letters.
- Compressor — has part. A pressure or vacuum blower.
- Pneumatic tube terminal — has part. A lock for receiving and sending capsules.
- Compressed air — uses. Air pressure.
- Cast iron — is made of. The tubes are cast iron.