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Subjects
Civil defense
3
Civil defense command
[remove]
3
Civil defense at factories
2
Simulation
2
Air-raid service
1
Antichemical-protection service
1
Black-out services
1
Engineering rescue services
1
Evacuation and refugee shelter services
1
NBC (nuclear, biological, chemical) special services
1
Radio warning
1
Training coordination
1
War production plants
1