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наблюдение в светлом полеacentos
cabl. observation against a bright background (field)
makár. observation against a bright back ground (в микроскопии)
metal. bright-field examination (под микроскопом); bright-field observation
tec. bright-field technique (в микроскопии); bright-field work (в микроскопии); observation against a bright background (в микроскопии); observation against a bright field (в микроскопии); observation against a bright back field (в микроскопии)