Hydrophilic polyurethane impregnated rubber

摘要

The U.S.Secretary of the Interior,washington,D.C.has received a patent for a sealing material for sealing water leaks in a water conveyance system caused by a hole in the conveyance system.The sealingmaterial is comprised of a sealing element of a size and shape adapted to be plugged into a hole producing a leak in the water conveyance system.