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Table T10. Filter parameters. (See table note.)

Data Minimum detectable gap (cm) Minimum piece length
(cm)
Edge effect
(cm)
GRA density 0.2 2 1
Magnetic susceptibility 0.2 8 4
Magnetic susceptibility point 0.2 3 1.5
L* 0.2 3 1.5
b* 0.2 3 1.5

Note: GRA = gamma ray attenuation, L* = reflectance parameter, b* = red/green color parameter.

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