英文關鍵字
automatic
big
billet
bridge
building
carcass
chains
construction
crane
engineering
equipment
factory
hanging
heavy
hook
industrial
industry
iron
lift
lifting
loadlifting
machine
machinery
manufacturing
mechanical
mechanism
metal
metallic
metalwork
motor
moving
overhead
plant
raise
site
steel
suspended
technology
transport
transports
unit
weight
work
working
workshop