frigorific การใช้

The mixture of ice, water, and salt creates a eutectic frigorific mixture which can get as cold as, much colder than ice alone.
They are also useful for creating low temperatures when mechanical refrigeration is not available, for example to tightly fit two parts of machined metal : one part is soaked in a frigorific mixture, causing it to cool and contract, and then placed into the uncooled second part.
Other fixed points used in the past are the body temperature ( of a healthy adult male ) which was originally used by Fahrenheit as his upper fixed point ( to be a number divisible by 12 ) and the lowest temperature given by a mixture of salt and ice, which was originally the definition of . ( This is an example of a Frigorific mixture ).