There are many different types of refrigerant used in our industry today. They are produced by several different manufacturers and have numerous ways of identification. One proper method of ...

Sometimes we are so tied up with complicated, difficult problems that we overlook the solid fundamentals that make things work. The fleet numbering system is one of those fundamentals. Individual ...

Dental students identified permanent teeth more quickly and accurately using the Universal Numbering System than the Fédération Dentaire Internationale (FDI) numbering system in a new study.