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.
  选定氯霉素的测定波长为274.;5 nm;参比波长为326nm; 水杨酸的测定波长为290 nm;参比波长为260nm。
• noise rating number (NRN)
  噪声值数
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