The above mentioned generalized study and research items of these major study fields mainly are regarding our findings in Part II of this study and so, they are partially already objectives of our recommendations for preliminary assessments. But we think, that no final treatment of them can be achieved in the scope of about one year. Potential Areas for European Participation in an SPS Development Programme PLV (Shuttle) - Passenger Module (Spacelab Experience) Development of Large lon-Bombardement Electric Thrusters High Pressure LH2/L0X Engine Development for POTV Solar Cell / Blanket Development Composite Materials Research High Voltage Switchgear / Regulators Development Microwave Generator Development Development of Rectenna Elements / Specific European Rectenna Design
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