英文關鍵字
boiler
building
business
check
checking
chemical
construction
contractor
control
energy
engineer
engineering
equipment
examination
factory
gas
heating
helmet
hvac
industrial
industry
inspection
inspector
maintenance
man
manufacturing
mechanical
occupation
oil
operator
people
person
pipe
pipeline
pipes
plant
power
pressure
pump
room
safety
service
site
system
technician
technology
valve
water
work
worker