ocr: LAWN SPRINKLER I A LAWN power of SPRINKLER water rushing converts the through I a TURN hose into a gentle to-and-fro motion of spray. The water spins a small turbine at high speed. Two stages of gears inside the sprinkler reduce the speed of 7 the turbine to turn a crank. The crank rocks the spray arm back and forth. TURBINE SPRAY ARM CRANK MECHANISM SEE ALSO FIRST WORM GEAR SECOND WORM GEAR
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