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A hand-held circular saw is the most conventional circular saw. This miter saw is a circular saw mounted to swing to crosscut wood at an angle. A table saw. Tractor-driven circular saw. A circular saw or a buzz saw, is a power-saw using a toothed or abrasive disc or blade to cut different materials using a rotary motion spinning around an arbor.
Historical osteotome, a medical bone chainsaw. A "flexible saw", consisting of a fine serrated link chain held between two wooden handles, was pioneered in the late 18th century (c. 1783 –1785) by two Scottish doctors, John Aitken and James Jeffray, for symphysiotomy and excision of diseased bone, respectively. [2]
Woodworking machinery such as circular saws, high speed lathes, planers and mortising machines and various other machines amazed British visitors, as was reported by Joseph Whitworth. [112] See: American system of manufacturing#Use of machinery. In the early 19th century machinery was made mostly of wood with iron parts.
Travel intelligence company OAG has released its annual list of the world’s busiest flight routes — and the 105-minute hop between the two has topped the international route board, with nearly ...
A day's continual work by the crew saw them hack a clear channel 150 yd (140 m) long. This work continued through the following day (15 February) and, with steam raised, the Endurance was backed up within her pool as far as possible to allow the ship to ram her way through the channel. As the ship went astern for successive attempts, lines were ...
Thomas Edison later saw one of these bulbs in a shop in Boston, and asked Farmer for advice on the electric light business. Alexander Lodygin on 1951 Soviet postal stamp. In 1872, Russian Alexander Lodygin invented an incandescent light bulb and obtained a Russian patent in 1874.
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