Abstract: A retaining wall system for forming a retaining wall on the ground is provided. The retaining wall system comprises a stackable retainer block having a top wall and a bottom wall. The top wall has at least a first receptacle and the bottom wall has at least a first projection insertable into the ground with each projection being receivable within a corresponding receptacle of an adjacent retainer block. The retainer block further comprises a longitudinal axis defining a first longitudinal half and a second longitudinal half and a transverse axis defining a first transverse half and a second transverse half wherein the retainer block is both symmetrical about the longitudinal axis and symmetrical about the transverse axis.

Abstract: An improved bowling lane stripping apparatus is disclosed of the type wherein the squeegee-equipped pickup head whose function it is to wipe the alley free of dirt-laden solvent is pivotally connected to the carriage carrying the power unit such that this head is free to raise up without gouging the lane surface as the carriage support wheels roll down the ramps leading into the gutters alongside the lane thereby causing the unit to tip forwardly. As a further improvement, the pickup head is so weighted and displaced forwardly of its pivotal connection to the carriage a distance chosen to cooperate with the weighted head and define a cantilevered mounting capable of maintaining the squeegee carried thereby in continuous wiping contact with the lane surface that thus becomes effective to remove even puddles and pools of liquid left in depressed areas of the latter.