機器
ancient
antique
axle
backdrop
background
bed
big
black
bolts
bulky
cast
construction
design
detail
engine
engineering
era
flywheel
fragment
gear
gears
heavy
huge
industrial
industry
iron
lube
mechanical
mechanics
mechanism
metal
movement
oiled
old
rough
shaft
steam
steampunk
steel
structure
system
train
victorian
wheel