NRN

常见例句

• The selected determining wavelength was 274.5 run and the reference wavelength of chloarmphenicol was 326 nm, the determining wavelength was 290 nrn and the reference wavelength salicylic acid was 260 nm.
  選定氯黴素的測定波長爲274.;5 nm;蓡比波長爲326nm; 水楊酸的測定波長爲290 nm;蓡比波長爲260nm。
• noise rating number (NRN)
  噪聲值數
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