機器
balance
blue
build
cement
chain
cloud
construct
construction
constructive
container
crane
day
derrick
development
dock
elevating
elevator
engineering
equipment
frame
hang
harbor
heavy
high
hook
industry
labor
large
lever
lifting
machinery
motor
outdoor
port
reel
rise
rotate
safety
seaport
site
sky
sling
steel
structure
tall
tower
weight
yellow