16 DRAFTING SETS AND DRAFTING INSTRUMENTS, NAMELY, DRAWING COMPASSES, AND DRAFTING MACHINES ATTACHABLE TO A DRAFTING TABLE AND CONSISTING OF A MOVEABLE ARM AND SCALE RULES; DRAWING ACCESSORIES, NAMELY, WOODEN AND STEEL T-SQUARES, SET SQUARES, ADJUSTABLE SET SQUARES, FRENCH CURVES, FLEXIBLE CURVES, PARALLEL RULING STRAIGHTEDGES, DUSTING BRUSHES, SANDPAPER PADS, DRY CLEANING PADS, PROTRACTORS, ERASING SHIELDS, PANTOGRAPHS, TEMPLATES; FIELD AND LEVEL BOOKS; AND LETTERING EQUIPMENT, NAMELY, LETTERING TEMPLATES, LETTERING SCRIBERS, AND SCRIBER/COMPASS ADAPTERS; AND MECHANICAL PENCILS, PARALLEL RULES, PLANIMETERS AND CURVOMETERS