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