機器
bluecollar
capacity
chain
construction
constructor
contractor
crane
danger
electric
energy
equipment
ground
heavy
heavyduty
highup
hoistrope
hook
hydraulic
industrial
latch
lift
lifting
load
lower
mast
material
mobile
modern
move
movement
operator
platform
pulley
rope
safety
sheave
site
stability
steel
structure
telescopic
tool
tower
transport
unload
wire
work
workers