about
free
exclusive
patterns
vector
microstock
premium
log in
sign up
about
free
exclusive
patterns
vector
microstock
premium
log in
sign up
Pencil and a slide rule on the old page with the calculations in
Keywords:
education
blueprint
pencil
architecture
diagram
plan
industry
science
paper
formula
engineering
learning
slide rule
paper rules
engineering calculations
calculation architecture
Select...
photo, drag here or paste
How to get an image URL
Right-click an image on the web and copy the image’s URL. Return to the search box and paste in the URL (Ctrl+V or Command+V).
By staying on our site, you agree to our use of cookies. Read more in the
cookie policy