tc17 sc2 2cd refractometers https://www.oiml.org/en/tc-sc-pg/committee-drafts/files/tc17-sc2-2cd-refractometers.pdf/view https://www.oiml.org/logo.png tc17 sc2 2cd refractometers tc17_sc2_2cd_refractometers.pdf — 1.5 MB