Vintage 1980 Spanish-language technical drawing and electrotechnics manual published by Editorial Trillas, Mexico.

A visually striking instructional engineering book covering technical drafting, electrotechnical drawing systems, geometric construction, machine elements, threaded components, welding diagrams, industrial structures, and mechanical/electrical representation methods.

Originally published in Germany and adapted into Spanish from the Brazilian edition, this volume reflects late-20th-century international technical education and industrial drafting pedagogy. Interior pages feature numerous diagrams, engineering illustrations, projection studies, and construction exercises throughout.

Contents include:
• technical drawing fundamentals
• geometric construction
• cylinders and projections
• mechanical drafting
• threaded components and screws
• welding and structural diagrams
• electrical and electrotechnical drawing systems
• industrial drafting exercises

Published by Editorial Trillas, Mexico, 1980.
First Spanish edition.

Condition:
Covers show visible edge wear, corner wear, creasing, scuffing, and age-related handling marks. Small split/wear present at lower spine corner. Interior pages remain clean and fully legible with strong diagrams throughout. Solid vintage technical reference with attractive industrial graphic design.