G01N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N27/00
Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
G01N27/00
Investigating or analysing materials by the use of electric, electrochemical, or magnetic means