英文關鍵字
black
building
cable
cargo
city
clipping
closeup
construction
crane
detail
engineering
equipment
factory
fence
harbor
hard
heavy
hoist
hook
industrial
industry
iron
lift
lifting
line
load
lock
machine
machinery
metal
nature
object
old
outdoor
roll
rope
rust
rusty
safety
steel
store
strength
strong
tighten
tool
warehouse
work