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jei naudojami kiti etalonai, pvz., polietilenglikolis, polioksietilenas, polimetilmetakrilatas, poliakrilo rūgštis, turi būti nurodyta priežastis.
if other standards are used, e.g. polyethylene glycol, polyethylene oxide, polymethyl methacrylate, polyacrylic acid, the reason should be stated.
