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DIN 12217:2002-06 Laboratory glassware - Tubes made of borosilicate glass 3.3
DIN 12217:2002-06 Laboratory glassware - Tubes made of borosilicate glass 3.3
DIN 6306:2002-06 Tommy screws with movable clamping bolt
DIN 6306:2002-06 Tommy screws with movable clamping bolt