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goniometer [goniometers]▼(device to measure crystals)noun[UK: ˌɡəʊ.ni.ˈɑː.mə.tə(r)] [US: ˌɡoʊ.ni.ˈɑː.mə.tər]
protractor [protractors]▼(a circular or semicircular tool for measuring angles)noun[UK: prə.ˈtræk.tə(r)] [US: prə.ˈtræk.tər]
radio direction finder▼noun
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