HPGL - Hewlett Packard
Graphics Language

HPGL -  Hewlett-PackardGraphics Language
a set of commands for controlling pen plotters and printers.

HPGL is long-time industry standard graphics language for 2/2.5D applications such as knife cutters, engraving machines and routers,
Z axis can be easy adapted for different applications.

All engraving softwares can import HPGL (.hpgl, .plt) files.

More about HPGL you can find in:
A handbook for program developers
The HP-GL/2 Reference Guide
Publisher: Addison-Wesley Publishing Company

A design or text engraved on a material.
Engraving is proces carving of letters or design into materials.

Engraving methods: 3D engraving, CNC engraving, Laser engraving, Cylindrical Engraving, Deep Engraving, Diamond engraving, Dot pen engraving, Drag Engraving, Hend engraving, Ring Engraving, Roll engraving, Rotary Engraving, Rotogravure.

Engraving product: Awards, Badges, Door Signs, Gun, Gifts, Jewelry, Key Tags, Knife, Medals, Memorial plaques, Mold, Name Plates, Pens, Pet & ID Tags, Picture, Plaques, Ring, Sculptures, Signs, Stamps, Technical Plates, Tools, Trophy Plates..

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