1, Fr is the unit of catheter, which was originally the unit for measuring circumference. It was invented by a French doctor and is short for English and French.

2.fr is the abbreviation of Functional Requirements, which means functional requirements.

Example: some? New? Functional? Requirements? Open? Numbers? Storage? Program? Control? Communication.

Some new functional requirements of program-controlled switches.

3.FR is also the abbreviation of Shanghai Farui Instrument. The products of FR model of Shanghai Farui Instruments are:

Tensile machine, tensile testing machine, universal material testing machine, tensile and compressive material test series: tensile strength, tear strength, peeling strength, bending die, three-point bending test and other physical properties can be done.

Environmental test series: such as constant temperature and humidity test box, high and low temperature box, salt water spray, low temperature and cold resistance, aging resistance, yellowing resistance, weather resistance and so on.