He is well-versed in the use of hidden weapons.

He analyzed the light of the stars using a new spectroscope.

This compressor is very efficient.

My digestive organ is healthy.

He spoke to the people at the assembly using a loudspeaker.

If you press this switch, the lights will turn on.

The hot water heater has broken, so we need to have it repaired.

I bought a new medical thermometer.

This meter is capable of accurate measurement.

This incubator is used to increase the survival rate of newborns.