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U-523
The U-523 (У-523) is a Russian base (inertia) impact fuze, which incorporates pyromechanically-initiated delayed-arming and self-destruction (SD) systems. The U-523 fuze, its GRAU (ГРАУ) index code 3V46 (3В46), equips the 3-O-25 (3-О-25) dual-purpose (shaped charge and fragmentation) submunition (see separate entry). The 3-O-25 submunition is dispensed by the 3-O-22 (3-О-22) and 3-O-23 (3-О-23) 152 mm artillery projectiles, with details on...
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