英文關鍵字
accuracy
big
central
construction
dof
efficiency
electromotor
energy
equipment
fabricator
factory
fuel
gas
gauge
generation
heat
heating
helmet
indicator
indoor
industry
instrument
looking
machine
machinist
maintenance
manual
measure
metal
modern
nobody
occupation
part
physical
pipe
pipeline
plant
power
pressure
protective
pump
refinery
residential
room
safety
shallow
station
supply
tilt
water