英语词汇“declination variometer”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	declination variometer
释义	declination variometer declination variometer [‚dek·lə′nā·shən ‚ver·ē′äm·əd·ər] (engineering) An instrument that measures changes in the declination of the earth's magnetic field, consisting of a permanent bar magnet, usually about 0.4 inch (1 centimeter) long, suspended with a plane mirror from a fine quartz fiber 2-6 inches (5-15 centimeters) in length; a lens focuses to a point a beam of light reflected from the mirror to recording paper mounted on a rotating drum. Also known as D variometer.
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