LABORATORY APPARATUSES, NAMELY, GLASS BEAKERS, FLASKS, BOTTLES, TEST TUBES, CRUCIBLES AND DISHES; APPARATUSES FOR SCIENTIFIC PURPOSES, NAMELY, DISTILLATORY APPARATUSES, COMBUSTION UNITS, COMBUSTION APPARATUSES, COMBUSTION TUBES, COILS, REACTORS, CONDENSERS; LABORATORY APPARATUSES, NAMELY, SILICA-GLASS SMELTERS AND SILICA-GLASS TRAYS AND BEAKERS; LABORATORY APPARATUSES AND INSTRUMENTS FOR LOW-VOLTAGE APPLICATIONS, NAMELY, FUSED QUARTZ BELL JARS, FUSED QUARTZ CRUCIBLES, INSULATORS; COMPONENTS F...