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  • Surprising Results When Testing Refractometers
  • dtum
Quite surprising results when testing all of my refractometers. Hanna gets the best marks and Hanna gets the worst marks!
ytateno ‐ That's a very interesting video. I enjoyed it :)
ytateno 1 month
zootank 1 month
dtum 3 months
micheljq 3 months