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PX7984-0-3_Type_1840_Modified_Magnetic_Tape_Transport_and_Power_Supply_Technical_Manual_Oct1973.pdf 24.92 MB 🧲
PX7985-1-2_Type_1840_Modified_Magnetic_Tape_Subsystem_Volume_I_Sections_1-6_Jan1974.pdf 36.17 MB 🧲