abstract
art
character
coal
collection
concept
decorative
design
drill
element
equipment
extraction
heavy
helmet
holding
icons
illustration
industrial
industry
inventory
isolated
isometric
job
labor
man
miner
mineral
mining
object
people
pickaxe
power
process
profession
rock
set
shovel
sign
stone
symbol
tool
transportation
transporting
trolley
uniform
wheelbarrow
worker
working