機器
abstract
aluminum
assorted
background
bolt
chrome
closeup
coil
construction
corrosion
detail
diversity
engineering
equipment
fasten
flat
group
hardware
industrial
industry
iron
junk
manufacturing
many
mechanic
metal
nut
object
old
repair
scrap
screw
shine
sign
spiritual
spring
stainless
steel
strength
symbol
tao
texture
thread
tighten
tool
yang
yin
yinyang
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