英文關鍵字
round
bar
metal
profile
line
symbol
material
construction
beam
pipe
square
diamond
plate
angle
brass
expanded
sheet
channel
safety
grating
steel
stainless
aluminum
copper
perforated
tube
flat
build
durable
girder
industrial
industry
iron
manufacture
product
shape
construct
strong
solid
heavy
manufacturing
pipeline
icon
motion
graphic
animation
pictogram
hd
animated
item
sign
color