MECHANICAL   P E R S O N   S C A L E   TERRAION  USA-Version (1960)
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( ... 280 lb )  Used here for measure the weight of CALCULATORS ...
                e.g.:  » STAR «  ADDING MACHINE (~ 10 lbs ) 

                       A METRIC PERSON SCALE ...
                       HOW MECHANICAL SCALES WORK ...
impressum:
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© C.HAMANN       http://public.BHT-Berlin.de/hamann        12/20/17