英文關鍵字
metal
list
production
industry
machine
symbol
selfframing
metallic
building
house
material
frame
bridge
construction
factory
equipment
stage
foundation
modern
garage
part
framework
barn
roof
layer
industrial
structure
roll
architecture
business
exterior
steel
technology
tool
girder
commercial
framing
job
iron
warehouse
engineering
icon
motion
graphic
animation
pictogram
hd
animated
item
line