英文關鍵字
auto
black
bokeh
car
change
close
closeup
defocused
dipstick
engine
flowmeter
hand
industry
levels
liquid
lubrication
machine
machinery
macro
maintenance
man
manual
measurement
mechanic
meter
motor
objects
occupation
oil
part
people
plastic
power
repair
service
shop
single
specialist
technology
the
tool
topping
transportation
vehicle