機器
black
blue
broom
buffing
building
business
busy
caretaker
chair
clean
cleaner
cleaning
closeup
commercial
danger
dust
employed
equipment
falling
floor
holding
indoors
industrial
information
interior
job
man
manual
marble
objects
occupation
office
one
person
plastic
polishing
profession
professional
self
standing
sweeping
symbol
white
working
yellow