機器
automatic
background
black
block
business
clean
close up
cold
cool
crack
cube
cut
dark
equipment
factory
grey
hold
ice
icy
indoors
industry
isolated
light
machinery
maker
making
modern
no people
nobody
on focus
pattern
plant
production
rectangle
spotlight
square
steel
taste
technology
texture
tool
top
transparent
under
water
working
workshop