certified /SCIENCE/
[DE] anerkannt
[EN] certified
[FR] certifié
certified /RESEARCH/
[DE] beglaubigt
[EN] certified
[FR] certifié; légalisé
certified,d,explosion-proof,flameproof,safe for use in methane atmospheres,safe in firedamp /ENERGY-MINING,ENG-ELECTRICAL/
[DE] schlagwettersicher
[EN] certified; d; explosion-proof; explosion-proof; flameproof; flameproof; safe for use in methane atmospheres; safe in firedamp
[FR] antigrisouteux