機器
assortment
background
car
cast
casting
circle
close up
copy
design
detail
development
device
dimensional
diverse
engine
engineering
equipment
exhibition
factory
foundry
gear
gray
group
industrial
industry
iron
joint
machinery
manufacturing
many
material
mechanical
mechanism
metal
metallic
object
part
piston
power
product
production
silver
steel
technology
transmission
various
warehouse
work