| 摘要 |
FIELD: armament. ^ SUBSTANCE: the barrel has a bore limited by diameter d, and rifles limited by diameter D. The bore section together with the grooves is made in the form of a triangle. The relation of the mentioned diameters is as follows: D/D>1.7. ^ EFFECT: prevented fire by metal (inflexible) bullets. ^ 2 cl, 1 dwg |
