guide coupling

guide coupling

[′gīd ‚kəp·liŋ]
(mining engineering)
A short coupling with a projecting reamer guide or pup to which is attached a reaming bit, which it couples to a reaming barrel.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Using liquid light guide coupling, the LED delivers broad-spectrum optical power with enhanced field uniformity at the specimen level via manual, personal computer (PC) and TTL control.