機器
background
belt
crane
crude
design
drill
drilling
driven
energy
engine
engineering
equipment
exploration
flywheel
fuel
gas
gear
industrial
industry
iron
machinery
mechanic
mechanical
mechanism
metal
metallic
motor
oil industry
oil production
old
part
petroleum
platform
pollution
power
production
pulley
pump
refinery
rig
spokes
steampunk
steel
tank
technology
tower
transmission
vintage
wheel