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boring mill

noun
1.
Metalworking. a machine for boring large holes in heavy work, having a table on which the work rotates while the hole is bored vertically.
Origin
1825-1835
1825-35
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for boring-mill

boring mill

noun
1.
(engineering) a large vertical lathe having a rotating table on which work is secured. Tools are held on a fixed post and the work is rotated around it Also called (informal) roundabout
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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