Encyclopedia

obturator pad

obturator pad

[′äb·tə‚rād·ər ¦pad]
(ordnance)
Pad of tough plastic material, forming part of an obturator.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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References in periodicals archive
Specifically, the spindle and obturator pad are turning up coated with rust!
I think the problem is that the spindle and obturator pad aren't being removed for cleaning and lubing after the howitzer is fired.
In their case, however, the lubrication instructions already say to remove the spindle and obturator pad for cleaning after firing.
Winning the great breech rust debate
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