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Harbor Freight Tools, commonly referred to as Harbor Freight, is an American privately held tool and equipment retailer, headquartered in Calabasas, California. It operates a chain of retail stores, as well as an e-commerce business. The company employs over 28,000 people in the United States, [5] and has over 1,500 locations in 48 states. [6] [7]
In 2014, Worx released a fully robotic lawn mower (dubbed the "Worx Landroid") that will mow the lawn, returning to a charging station if the battery begins to run low. [14] The Worx JawSaw is a chainsaw with a partially enclosed blade that is designed for safety. [6] Other products include leaf blowers, yard carts, and other accessories.
The first known lawn mower had a cylinder cutting gear made of iron. [citation needed] It was used to mow sporting grounds and wide-ranging gardens.As manufacturers changed the design and structure of mowers, the cutting mechanism also developed and evolved into several varieties, including cylinder/reel blades, deck blades, mulching blades, and lifting blades.
In 1870, Elwood McGuire of Richmond, Indiana designed a human-pushed lawn mower, which was very lightweight and a commercial success. John Burr patented an improved rotary-blade lawn mower in 1899, with the wheel placement altered for better performance. Amariah Hills went on to found the Archimedean Lawn Mower Co. in 1871.
Balance shaft in Ford Taunus V4 engine.. Balance shafts are used in piston engines to reduce vibration by cancelling out unbalanced dynamic forces. The counter balance shafts have eccentric weights and rotate in the opposite direction to each other, which generates a net vertical force.
Amelia Mary Earhart (/ ˈ ɛər h ɑːr t / AIR-hart; born July 24, 1897; declared dead January 5, 1939) was an American aviation pioneer.On July 2, 1937, she disappeared over the Pacific Ocean while attempting to become the first female pilot to circumnavigate the world.
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