the spirometer
A spirometer is used in measuring the air capacity of the lungs.
Spirometer...spirometerSpirometer
spirometer
spirometer
A spirometer can be used to monitor a person's breathing rate and the volume of air inhaled and exhaled. For persons suffering of lung-disease or asthma, this can make a spirometer a valuable monitoring tool in regards of their specific illnesses.
spirometer
They r the same
Spirometer
spirometer
One example is the spirometer.
Spirometer