G
PHYSICS
G
PHYSICS
G01
MEASURING; TESTING
G01
MEASURING; TESTING
G01N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N17/00
Investigating resistance of materials to the weather, to corrosion, or to light
G01N17/00
Investigating resistance of materials to the weather, to corrosion, or to light