Abstract: Various embodiments disclosed relate to an abrasive sheet. The abrasive sheet includes a first layer including an abrasive major surface and an opposite second layer defining a second major surface. The second major surface includes a plurality of protrusions extending outwardly from the second major surface. The protrusions include a first polymer component having at least one of a Shore A hardness ranging from about 5 to about 100 and a Shore D hardness ranging from about 1 to about 70. The first layer and the second layer are directly joined to each other.

Abstract: The combination of a self-powered reel dolly and a traveling plow injector carriage joined together by a traveling hard hose supply line is disclosed. The plow injector carriage carries a multiple shank plow and a plurality of injector pipes which, when the plow blades are engaged in the ground, provide sub-surface injection of liquified sludge or other waste materials which is supplied to the carriage through the hard hose supply line. As the reel dolly winds in the supply line, the latter correspondingly pulls in or returns the plow injector carriage from an initial downfield position to a final "home" position adjacent the reel dolly. In addition to underground dispersion of the effluent through the injector pipes, an additional above-ground water gun and/or spreader manifold can be used as desired.