This clock is running using a mainspring.

I made a calendar using the new calender.

Since my new video game console has arrived, I'm going to invite my friends over for a party tonight.

This transmitter can send signals far away.

The enemy aircraft invaded our airspace.

Please use the stairs because the elevator is broken.

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

The time has come for his plan to be approved.

He shot a movie using a new movie camera.

He carefully maintained his beloved aircraft.