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Block 1: retractable turret for two 75 mm canons
Block 2: retractable turret for machinegun
Block 3: observation block 
Block 4: three embrasures for 75 mm canons
Block 5: retractable turret for two 81 mm mortars
Block 6: retractable turret for machinegun
Block 7: infantry block
Crew entrance entrance for crew and air intake and chimney
Ammunition entrance entrance for crew and ammunition
Barracks living area for the crew
Power plant Power supply for the fort
M1 central ammonium warehouse