DuckCorp Dico

Found one definition

1.                 From Mueller English-Russian Dictionary:
                   
   
   
                   
                     
   blowing
      _I  [↗blɜʊɪŋ]
         1. _pres-p. от blow II, 2
         2. _n.
            1) дутьЁ
            2) просАчивание, утЕчка (газа, пара)
      II [↗blɜʊɪŋ] pres-p. от blow III, 2