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IMPROVED METHODS OF AIR-CUSHIONING AND ROAD-FRICTION-REDUCTION OF BI-CYCLES, CAMEL-CARTS, AND AUTOMOBILES : (1) USING CELLULAR TUBES (2) AIR-TIGHTENING OF THE TUBES
IMPROVED METHODS OF AIR-CUSHIONING AND ROAD-FRICTION-REDUCTION OF BI-CYCLES, CAMEL-CARTS, AND AUTOMOBILES : (1) USING CELLULAR TUBES (2) AIR-TIGHTENING OF THE TUBES