hydraulic swivel head
hydraulic swivel head
[hi′drȯ·lik ′swiv·əl ‚hed] (mechanical engineering)
In a drill machine, a swivel head equipped with hydraulically actuated cylinders and pistons to exert pressure on and move the drill rod string longitudinally.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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