英文關鍵字
abstract
animation
background
bar
bars
brass
circle
construction
cupper
cylinder
factory
ferrous
group
heap
heavy
industrial
industry
joist
kernel
loop
loopable
manufacture
material
metal
metallic
nobody
objects
pipe
plant
profile
raw
rod
rods
set
solid
stack
stainless
steel
technology
tube
warehouse
yellow