The level of technology is limited in their sources, in hardware, but not brainware. They can't get some of the nice new components, so they make their own.
他們的科技水準受限於能獲得的資源，是硬體，而不是受限於他們的腦力；他們無法得到一些西方國家最新發展的零組件，就只好自己造。