groove sample

groove sample

[′grüv ‚sam·pəl]
(mining engineering)
A sample of coal or ore obtained by cutting appropriate grooves along or across the road exposures. Also known as channel sample.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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(146) Under the observability test, a looped drum groove sample would receive more quantitative importance than a non-looped drum sample.
Tongue and groove samples along with different styles of mouldings are displayed on the wall near one of the entrances.