機器
abstract
background
building
cellular
connect
connection
construction
craft
craftsman
cutting
detail
electrode
engineering
equipment
fabrication
factory
fire
industrial
industry
inspector
iron
joint
labor
light
lightning
manufacture
manufacturing
material
metal
metallic
pipe
protection
repair
rough
rust
safety
skill
spark
sparkle
steel
structure
technical
technology
texture
welder
welding
work
worker
workshop