Oerlikon 20 mm cannon - Wikipedia
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Oerlikon - Wiktionary, the free dictionary
Oerlikon 20 mm cannon - Wikipedia
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File:Oerlikon-20mm-batey-haosef-2-1.jpg - Wikipedia
Category:Oerlikon AA gun | World War II Wiki | Fandom
Oerlikon 30 mm twin cannon - Wikipedia
File:Oerlikon20 mm cannon on the SS Jeremiah O'Brien.jpg - Wikipedia
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Oerlikon (Zürich) - Wikipedia
