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Tài liệu tham khảo WikiPedia: Bofors_40_mm http://www.antiaircraft.org.au/about-us/on-target/... http://www.army-technology.com/contractors/machine... http://www.baesystems.com/ProductsServices/l_and_a... http://books.google.com/books?id=1iYDAAAAMBAJ&lpg=... http://books.google.com/books?id=VCcDAAAAMBAJ&pg=P... http://www.navweaps.com/Weapons/WNSweden_4cm-70_m1... http://www.navweaps.com/Weapons/WNUS_4cm-56_mk12.h... http://www.youtube.com/watch?v=dSp7CipN1pw http://www.otomelara.it/products/products.asp?id=p... http://www.cdsg.org/downloads/40_mm.pdf
