Major P3 and S3 subsystems include the Segment-to-Segment Attach System (SSAS), Solar Alpha Rotary Joint (SARJ), and Unpressurized Cargo Carrier Attach System (UCCAS).
Hlavné podsystémy častí P3 a S3 zahrňujú Segment-to-Segment Attach System (SSAS), Solar Alpha Rotary Joint (SARJ) a Unpressurized Cargo Carrier Attach System (UCCAS).