1. 
   K 9
   The K 9 was a Dutch K 8 Class submarine of 521 tons displacement launched in 1922. She was powered by two sets of Schelde-Sulzer diesel engines providing a top speed of 16 knots surfaced and 9.5 knots submerged. She carried a complement of 31 and was armed with one 3.5 inch anti-aircraft gun; one 12...
   Found op http://www.probertencyclopaedia.com/browse/RK.HTM
   
   
2. 
   K-9
   K-9 is a crime comedy starring James Belushi and Mel Harris in a story about a crazy American policeman who is close to nailing a drugs bust, but no-one will work with him except an Alsatian police dog. K-9 was directed by Rod Daniel in 1989.
   Found op http://www.probertencyclopaedia.com/browse/MK.HTM
   
   
3. 
   K9
   K9 is an abbreviation for canine
   Found op http://www.probertencyclopaedia.com/N11.HTM
   
   

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