发明名称 PROJETIL E SISTEMA BALISTICO
摘要 913,223 Ballistic projectiles for subsonic propulsion having a helically twisted body portion and a tapered nose portion and having an apparent density of up to 5 g/cm3. The projectiles can be propelled through barrels having a complementary barrel without objectionable fouling.
申请公布号 BR7707517(A) 申请公布日期 1978.06.20
申请号 BR19777707517 申请日期 1977.11.09
申请人 MINNESOTA MINING & MFG CO 发明人 DRAKE J
分类号 A61D7/00;F42B5/02;(IPC1-7):F42B5/02 主分类号 A61D7/00
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