英文關鍵字
analysis
boiler
caucasian
checking
compressor
concept
condensing
engineer
equality
equipment
factory
faucet
folder
gas
gauge
heating
helmet
holding
house
hvac
indicator
industry
inspection
inspector
maintenance
manometer
manufacturing
measuring
person
pipeline
pipes
plumber
portrait
production
pump
repairman
service
system
tablet
technology
thermostat
tube
valve
vessel
water
woman
work
worker
workwear
young