ធនធាន ដាក់ស្លាក: Refractometers
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20 តុលា 2001 A friend of ECHO recently wrote to us on behalf of a farmer in Chilewho raises naval oranges. Apparently oranges are attheir sweetest when they are still green. When the farmer thinks they have reached the pinnacle of sweetness, he moves them to a greenhouse, where they turn orange. We were asked...