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abstraction > mathematical concept > unit > non SI unit > bel
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bel
(B)
subjectfact 
belhas symbol B2001-09-27 09:32:55.0
has value in SI unit (1/2) ln 10 Np2001-09-27 09:32:55.0
is an instance of non SI unit2001-09-27 09:32:55.0
unithas historical origin2001-09-27 09:32:42.0
represents2001-09-27 09:32:42.0