機器
background
careful
close up
container
cylinder
danger
device
engineering
environment
equipment
factory
flange
frost
frozen
gas
ice
industrial
industry
keeping
laboratory
liquid
liquid nitrogen
manufacture
manufacturing
mechanic
metal
nitrogen
part
physics
pipe
pipes
plant
power
pressure
research
safety
science
stainless
steel
storage
system
tank
technology
tube
vacuum
vacuum system
valve
vessel
work