機器
appliance
belt
chemical
cistern
construction
container
control
danger
defect
device
element
engine
equipment
factory
flaw
frame
gas
gear
industrial
industry
instrument
machinery
mechanism
metal
moving
operation
pipe
pipeline
pipes
piping
plant
processing
quality
radiation
sign
tank
test
tools
treatment
tube
unit
water
weld
welding
xray