Ключевые слова:
Public enterprises|Safety devices|Engineering drawings|Work study|Electronic engineering|Process charts|Graphical methods|Electrical engineering|Electrical components|Warning devices|Graphic representation|Marks|Heat engineering|Drawings|Circuit diagrams|Diagrams|Pipework systems|Road vehicle components|Welding|Symbols|Electrical household appliances|Electrical equipment|Graphic symbols|Flow charts|Signs|Fluid engineering|Fluid equipment|Electronic equipment and components|Block diagrams