機器
2018
analysis
background
bar
bottle
closeup
control
device
energy
engineering
equipment
europe
experiment
gas
gauge
hydraulic
indicator
industrial
industry
instrument
lab
laboratory
macro
manometer
measure
measurement
metal
meter
oil
pipe
power
pressure
psi
pump
research
scale
science
scientific
steel
sweden
swedish
technology
test
tool
valve
water
white
work