A lawn mower (also known as a mower, grass cutter or lawnmower) is a machine utilizing one or more revolving blades to cut a grass surface to an even height. The height of the cut grass may be fixed by the design of the mower, but generally is adjustable by the operator, typically by a single master lever, or by a lever or nut and bolt on each of the machine’s wheels.
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Morse code
invented by Samuel Morse
Morse code is a method used in telecommunication to encode text characters as…
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invented by Fyodor Pirotsky
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invented by Francois Coignet
Reinforced concrete (RC), also called reinforced cement concrete (RCC), is a…
Hot blast
invented by James Beaumont Neilson
Hot blast refers to the preheating of air blown into a blast furnace or other…
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