A fire marshal, in the United States and Canada, is often a member of a fire department but may be part of a building department or a separate department altogether.
An average human red blood cell is approximately 5 microns in diameter. The average diameter of human hair is roughly 0.0035 inches in diameter, which is equivalent to 75 microns. The abbreviation micron was initially used to distinguish the units of a tool used to measure small distances, also called a micrometer.
Tasks of micro and nano technology related operations are done in specially designed clean rooms, where dust and dirt is not available. Also, in both micro and nano technology research, scientists have to follow special dress codes to prevent small dust particles interacting with products. Micro technology. Micrometer (also referred to as micron) is a millionth of a meter (10 ^-6 m).