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Abbreviation
Max
mg
3
mg/m
Mid IR
Min
mm
NEC
NFPA
3
NH
nm
NO
N
O
2
No.
O
2
PC
ppm
QCL
SELV
Torr
USA
USB
V
Vac
Vdc
W
WEEE
µm
10
Description
Maximum
Milligram
Milligram/cubicmeter
Mid Infrared
Minimum
Millimeter
National Electrical Code
National Fire Protection Association
Ammonia
Nanometer
Nitricoxide
Nitrousoxide
Number
Oxygen
Personal computer
Parts per million
Quantum Cascade Laser
Safety Extra Low Voltage (SELV) circuits.
Unit of pressure defined as exactly 1/760 of a standard atmosphere
United States of America
Universal serial bus
Volt
Volt alternating current
Volt direct current
Watt
Waste electrical and electronic equipment
Micro-meter
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