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LUDLUM MODEL 133 SERIES
GAMMA DETECTOR
February 2018
Serial Number PR-373191 for Model 133-2 and
Serial Number PR-372938 for the remainder of the 133 Series
and Succeeding Serial Numbers
Manual covers these model numbers:
(133-2, 133-2-1, 133-3, 133-3-1,
133-4, 133-4-1, 133-6, 133-6-1, 133-7, 133-7-1)
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