The dandy horse, a derogatory term for what was first called a Laufmaschine (in German), then a vélocipède or draisienne (in French and then English), and then a pedestrian curricle or hobby-horse, is a human-powered vehicle that, being the first means of transport to make use of the two-wheeler principle, is regarded as the forerunner of the bicycle.
invented by Anyos Jedlik
invented by James Fox
A planer is a type of metalworking machine tool that uses linear relative…
invented by Sir William Armstrong
A hydraulic accumulator is a pressure storage reservoir in which an…
invented by Gustave Trouve
A metal detector is an instrument that detects the presence of metal nearby.…
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