Lateen sail, astrolabe, magnetic compass, rudder, mapmaking skills (Latitude and Longitude), Caravel (let ships sail INTO the wind); All helped with European Exploration; Islamic scholars saved Greek and Roman texts, zero, medical advances, numbers/algebra
That would be Australia :)
Answer:
both dynasties heavily restricted trade with europe
Explanation
Generally speaking, "assembly line jobs" did not represent an obstacle during this time, since this in fact increased productivity through the "specialization of labor".
