英文關鍵字
builder
building
cargo
concrete
construction
constructor
contractor
control
crane
detail
elevator
engineer
engineering
equipment
hand
happy
heavy
helmet
high
hoisting
industrial
industry
jib
lift
lifting
looking
machine
machinery
male
man
metal
mobile
move
occupation
operating
operator
people
project
protection
safety
site
sky
steel
structure
tall
technology
vehicle
work
worker
yellow