Aeronautic instrument that measures R.P.M. (unidentified2).jpg
National Institute of Standards and Technology
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Aeronautic instrument that measures R.P.M. (unidentified2), Aeronautical measurement, Aerospace engineering, National Bureau of Standards
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Aeronautic instrument that measures R.P.M. (unidentified2), Aeronautic instrument that measures R.P.M.
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R.P.M.を測定対象とする航空機器(未確認2)、航空測定、航空宇宙工学、国立標準局
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R.P.M.を測る航空機器
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aeronautical engineering aeronautical engineer aerospace engineering rocket scientist office instrument aeronautics aerospace engineer aeronautical revolutions per minute