G PHYSICS
G01 MEASURING; TESTING
G01B MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
G01B5/00 Measuring arrangements characterised by the use of mechanical techniques
G01B5/004 for measuring coordinates of points
G01B5/008 using coordinate measuring machines
G01B5/012 Contact-making feeler heads therefor