Optical Refractometer pictures(within logo)-Long

Those refractometer pictures use for:
RHS-10 0-10% salinity, 
RHS-40 0-4% salinity, 
RHW-80v 0-80v/v alcohol, 
RHB-05 0-5% Brix, 
RHB-10 0-10% Brix, 
RHB-18 0-18% Brix, 
RHC-300 dog and cat clinical








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