… Laboratory, hygienic or pharmaceutical glassware, whether or …
Explanatory notes
… pharmaceutical, industrial, etc.), including special bottles (gas washing, reagent, Woulf’s, etc.), special tubes … etc.), special spirit burners, mortars, weighing boats, pipettes, vacuum vessels of various specialized types … purposes), but laboratory glassware is frequently of borosilicate glass, fused quartz or other fused silica …