英文關鍵字
boiler
checking
circulation
clipboard
clothes
construction
controlling
engineer
engineering
equipment
examining
factory
female
heating
helmet
indications
industrial
industry
inspector
job
looking
maintenance
male
man
manometer
node
occupation
pipeline
pipes
plumber
power
pressure
professional
repairman
room
safety
speak
system
technician
technology
thermal
valve
verification
water
woman
work
worker
write
young