HP 522B Operating And Service Manual page 5

OPE
RATING AND SERVICING MANUAL
FOR
MODEL 5228
ELECTRONIC COUNTER
SERIAL
2?33 AND ABOVE
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Cop,lrrshl
HEWLETT-PACKARD
COMPANY
1954
2?5 PACE
MILL
RO
AD,
PALO ALTO.
CAT,IFORNIA,
U.S.A.