305-00 Engineering, Surveying, Drawing Equipment, Supplies, Etc.
- 04 Blades, Gouges, Knives, Needle, Files, Routers, Etc.
- 06 Calculators (Programmed for Surveying Ststems)
- 08 Cloths, Films, Paper, Cross Section, Graph, Tracing, Etc.
- 10 Cloths, Films, and Papers (Stock): Cross Section, Graph, Etc
- 12 Cloths, Films, and Papers, Reproduction Types
- 15 Covers (For Drafting and Drawing Boards)
- 18 Data Books and Tables, Engineering and Surveying
- 21 Direct Print Supplies, Dry Process
- 23 Direct Print Supplies, Wet Process
- 25 Distance Measuring Equipment
- 28 Drafting and Drawing Pencils, Pens, Leads, Lead Holders, Etc
- 30 Envelopes, Plain, Stock Sizes
- 32 Drafting Machines and Scales
- 33 Drafting Supplies: Brushes, Cleaning Pads, Powder, Etc.
- 35 Drawing Boards, Curves, Templates, Triangles, Etc.
- 38 Duplicator Paper: Blue, Brown and White Print
- 39 Duplicator Paper, Chemicals and Supplies
- 40 Duplicators: Blue, Brown and White Print, Diazo Process, Etc
- 42 Engineering Supplies, Etc.
- 44 Erasers and Erasing Machines
- 48 Field Books, Engineers'
- 50 Field Equipment: Arrows, Knives, Flags, Levels, Poles, Etc.
- 53 Graphic Art Type Supplies
- 55 Lettering Equipment: Automatic
- 57 Lettering Equipment: Hand
- 58 Magnifying Glasses, Reading Glasses, Mirrors, Prisms, Etc.
- 60 Measuring Equipment: Chains, Maps, Tapes, Wheels, Etc.
- 64 Opaquing and Transparentizing Liquids, Fluids, Pastes, Etc.
- 68 Planimeters
- 69 Projectional Supplies: Acetate Sheets, Films, Etc.
- 70 Projectional Supplies, Miscellaneous
- 72 Slide Rules
- 75 Straightedges
- 78 Surveying Instruments: Alidades, Compasses, Tripods, Etc.
- 80 Surveying Systems, Geo/satellite Navigation Type
- 82 Tables, Tracing and Light
- 84 Technical Pens, Sets, Points and Refills, Etc.
- 99 Commodities Not Otherwise Classified
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