Example: biology
Graphic1 - Missouri S&T
the rock mass. Thus it is simply a measurement or the percentage of "good" rock recovered from an interval or a borehole. Core Size Thc RQD was originally developed for NX-size core (54.7 mm 12.16 in.] diameter). Decre 161 specified that a minimum NX-size core obtained with double-tube corc barrels should bc uscd.
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