abstract
alphabet
below
black
black color
cut out
danger
digitally generated image
document
factory
frame
heavy
icon
illustration
industry
iron
isolated
letter
letter f
metal
metallic
number
old
orthographic symbol
pattern
plate
protection
render
rough
rusty
safety
security
sign
steel
strength
striped
symbol
text
three dimensional shape
typescript
warning sign
warning symbol
yellow