This comes from the design feature of having the guidance and other computer systems in a separate pressure chamber (the instruments) from the rocket engines, their propellant tanks, and the life support tanks (from the German Aggregat, which gets translated "assembly").
Ini berasal dari fitur desain memiliki bimbingan dan sistem komputer lainnya di ruang tekanan terpisah (instrumen) dari mesin roket, tank propelan mereka, dan tank-tank pendukung kehidupan (dari Aggregat Jerman, yang akan diterjemahkan "perakitan").