THE_HOYER‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬•S_SYSTEM_OF_PRESTRESSING_PROVES_TO_BE_ECONOMICAL_FOR:?$#

• A. Pre tensioning system
• B. Post tensioning system
• C. Beam casting
• D. Bed casting