It means he thinks you are lovely. that's a beautiful compliment, but it doesnt necessarily have to mean more than that. It means he secretly likes you and doesn't have the courage to tell you that he likes you to your face. could just be flirting to see what you're reaction would be like.
Medical air is also used during anesthesia as a substitute for nitrous oxide to reduce the high concentration of oxygen exposure. While the source of medical air may be a manifold with a bank of compressed air cylinders, most hospitals use a compressor system. This article will refer to installations with air compressors. An illustration of a typical medical air plant is provided for your reference throughout this article's discussion.
To use a nebulizer, you attach the nebulizer hose to an air compressor, a small machine that takes air from the environment and turns it into a high-pressure stream. The drug is placed into a small cup. Air from the compressor converts the drug into an aerosol mist that you inhale through a mouthpiece.