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ENGINEERING AND DRAFTING SUPPLIES AS FOLLOWS- SENSITIZED PRODUCTS NAMELY, LIGHT-SENSITIVE PAPERS AND CLOTHS, BLUE-PRINT PAPERS AND CLOTHS, DIRECT-PRINTING SENSITIZED PAPERS AND CLOTHS, AND TRANSPARENTIZED LIGHT-SENSITIVE SHEETS; DRAFTING EQUIPMENT-NAMELY, DRAWING BOARDS; DRAWING INSTRUMENTS-NAMELY, DIVIDERS, PEN AND PENCIL COMPASSES, RULING PENS, BOW PENS AND BOW PENCILS, BEAM COMPASSES, AND CASES THEREFOR; RULED SCALES OF VARIOUS TYPES; SLIDE RULES AND OTHER RULES OF SUNDRY TYPES AND CASES THEREFOR; PANTOGRAPHS; DRAFTING MACHINES AND ACCESSORIES THEREFOR-NAMELY, ANGLE-IRON BRACES, VERTICAL UPRIGHT BRACES, DRAWING BOARDS, STAINLESS STEEL TRACK, WEIGHT BOXES, SCALES, CARTRIDGE STABILIZERS, WEIGHT STABILIZERS AND STRAIGHT EDGES; PROTRACTORS OF SUNDRY TYPES; PLANIMETERS OF SUNDRY TYPES; TRIANGLES; LETTERING AND DRAWING GUIDES FOR DRAFTSMAN'S USE; BLACKBOARD DIVIDERS; BLACKBOARD DRAWING SETS COMPRISING T-SQUARES, STRAIGHT EDGES, TRIANGLES, AND PROTRACTORS; STRAIGHT EDGES; T-SQUARES; FIXED AND ADJUSTABLE DRAWING CURVES AND WEIGHTS AND SPLINES THEREFOR; MATHEMATICAL CURVE DRAWING GUIDES; ELLIPSOGRAPHS; COPENHAGEN SHIP CURVES AND OTHER SPECIALTY ENGINEERING CURVES; DRAFTSMAN'S DRAWING KITS COMPRISING DRAWING BOARDS, T-SQUARES, AND TRIANGLES; DRAWING TABLE AND BOARD SUPPORTING HORSES; DRAFTING ROOM EQUIPMENT-NAMELY, DRAWING STANDS, DRAWING TABLES, TRACING TABLES, AND DRAFTSMAN'S STOOLS; PHOTOGRAPHIC EQUIPMENT-NAMELY, PHOTOGRAPHIC CLIPS, METAL TRAYS FOR PHOTOGRAPHIC BATHS, PRINTING FRAMES, VACUUM PHOTOGRAPHIC PRINTING FRAMES AND CARRIAGES, VACUUM PUMPS THEREFOR, AND REPLACEMENT PARTS FOR SAID FRAMES AND CARRIAGES INCLUDING VACUUM PADS, CLAMPS, AND HOSE, ELECTRIC LIGHTED VACUUM PHOTOGRAPHIC PRINTING FRAMES AND LIGHT PHOTOGRAPHIC PRINTING MACHINES; SURVEYING EQUIPMENT-NAMELY, STEEL CHAINS, LEVELING RODS, STADIA RODS, RANGE POLES, SURVEYOR'S LEVELS AND TRANSITS, MAGNETIC COMPASSES AND DIP NEEDLES, SURVEYOR'S TRIPODS, SURVEYOR'S PLANE TABLES; SURVEYOR'S ENGINEER'S AND ARCHITECT'S FIELD, LEVEL, TRANSIT, AND CROSS-SECTION BOOKS, WHICH ARE PARTLY PRINTED MATTER; SURVEYOR'S CARRYING BAGS; AND SURVEYOR'S ACCESSORIES-NAMELY, SCRIBES, TARGETS, LEVELS, TALLYING MACHINES, COUNTERS, STAKE TACKS, MARKING PINS AND ARROWS, AND PLUMB BOBS; AND ENGINEERING EQUIPMENT-NAMELY, MEASURING TAPES OF SUNDRY TYPES, MAP MEASURES FOR MEASURING AREAS, INDICATING BAROMETERS, RECORDING BAROMETERS, RECORDING THERMOMETERS, ANEMOMETERS, RAIN GAUGES, BINOCULARS, MAGNIFYING GLASSES, AND REDUCING GLASSES