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$“B+S”High Accuracy Digital Refractometers, RFM 300+ Series, with Peltier Temperature Control Sapphire Prism Optical System, Over 100 Methods & 700 Stored Readings, Wide Range 1.32 to 1.58RI 고정밀 디지털 굴절계, Auto Read, Dual Scale Display, Auto-Resolution Funct$