AK27I means 73% nitric acid + 27% N2O4 + Iodine passivant
AK = Azotna Kislota = Nitric Acid in
NASA
Similar to AK27I
A - Ampere
A - Alpha
A - Acceleration
A - Aft
A&A - Advertise and Award
A&E - Architectural and Engineering
A&E - Architects and Engineering
View all in NASA