This clock is running using a mainspring.

This transmitter can send signals far away.

The enemy aircraft invaded our airspace.

In my school, we sometimes watch movies using a projector.

This old magic lantern is what my grandfather used when he was young.

He shot a movie using a new movie camera.

The outdoor air conditioner unit has broken down, so we need to have it repaired.

This phototypesetting machine is used for printing newspapers and magazines.

This car is equipped with an automatic transmission.

My new lawnmower is very efficient.