機器
appliance
black
chemical
construction
control
danger
defect
device
dirt
element
environment
equipment
factory
flange
flaw
gear
industrial
industry
instrument
iron
machinery
mechanism
metal
nondestructive
oil
outdoors
pipe
pipeline
portable
processing
quality
radiation
radiography
repair
steel
tank
technology
test
treatment
tube
unit
weld
welding
xray