機器
attachment
blue
bridge
building
california
chain
chimney
coast
connection
construction
electric
energy
environment
equipment
factory
fog
foggy
gas
golden gate bridge
haze
high
iconic
industrial
industry
iron
ligament
metal
miniature
model
oboe
ocean
oil
overpass
plant
power
red
road
san francisco
sax
sky
steel
technology
tourism
tower
travel
water
west coast
woodwind
work