To cut grass {lawn mower}|, hand lawn mowers {reel-type mower} have metal bar {cutting bar} at grass level and four helical reel blades, which scissor grass on cutting bar as reel turns with rolling wheels. Motorized mowers {rotary blade lawn mower} have two-blade propeller at ground level, which spins rapidly, sucks grass straight up, chops grass, and blows grass out. Slip clutch allows motor to keep spinning if blade becomes stuck. Motorized mowers start by pulling cord to spin motor crankshaft.
Practical Affairs>Machine>Kinds>Mechanical>Rotation
7-Machine-Kinds-Mechanical-Rotation
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Date Modified: 2022.0224