CPC Subgroup
A62C 3/04 for dust or loosely-baled or loosely-piled materials, e.g. in silos, in chimneys (flame traps A62C4/00)
Full Title
Fire prevention, containment or extinguishing specially adapted for particular objects or places ( ; for nuclear reactors G21C9/04) > for dust or loosely-baled or loosely-piled materials, e.g. in silos, in chimneys (flame traps A62C4/00)