If you have any opinions concerning traffic calming devices (humps, curb extensions, etc.) please write them.

Birds, for instance, have a special protective device.

It would be difficult to improve the device without an effective catalyst.

Her kitchen is equipped with labor-saving devices.

His invention is superior to conventional equipment.

Make sure that the device is attached firmly to the ceiling.

Man, too, has been given protective devices against extreme temperatures.

We talked over Jack's plan to put in air conditioning, but could not come to a decision.

Everyone was really impressed with that machine.

The device is attached fast to the ceiling.

You can't turn the heat off as long as the system is operating.

All these devices are unreliable.

This device produces electricity.

This device made it possible to turn sea-water into fresh water easily.

Edison invented a device for duplication.

I bought an anti-theft system for my bike.

We had a little trouble with the equipment yesterday.

This device allows humans to breathe underwater.