31353337primersPT2026-03-30 20:35:22UF31353338primerNDUF31353339priming systemsNDUF31353340systems, primingNDBT31324525explosive equipmentPTNT31387318fuzesPTNT31324927detonation primersPTNT31324929friction primersPTRT31344171priming powderPT