英文關鍵字
building
cargo
chain
closeup
construction
control
crane
cutting
energy
engineering
equipment
factory
hang
heavy
hoist
hook
industrial
industry
iron
job
large
lift
lifting
line
load
machine
machinery
manufacture
manufacturing
mechanism
metal
metallic
metalwork
moving
plant
power
production
steel
strength
swivel
technology
tool
transportation
warehouse
weight
winch
workplace
workshop
yellow