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man lock

noun
1.
an air lock serving as a decompression chamber for workers.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for man lock

man lock

noun
1.
(civil engineering) an airlock that allows workmen to pass in and out of spaces with differing air pressures, esp one providing access to and from a tunnel, shaft, or caisson in which the air is compressed
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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