3nh YS4580 45/0 20mm Aperture Grating Spectrophotometer for Traffic Signs with GB 2893 and GB/T 18833 standard color

Product Description: YS4580 45/0 Grating Spectrophotometer with 20mm Aperture for Traffic Signs YS4580 spectrophotometer uses 45/0 (45 degree ring illumination, 0 degree reception) geometric optical structure in ...learn more
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