ESR

electrical-substitution radiometer
電気置換型放射計. 電気置換ラジオメータ. 光パワー測定器の一次標準.
electrical-substitution radiometer; used as a primary standard for the calibrationof radiometric instruments; ref. WRR(Radiation Reference scale) is based on a series of ESRs from around the world;
[Phys:L:Opt].

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