across
against
blue
cable
camera
column
communication
connection
danger
electric
electrical
electricity
energy
engineering
geometry
high
industrial
industry
lamp
lantern
lighting
line
lines
metal
network
observe
old
outdoor
pillar
pole
post
power
pylon
recorder
road
russian
security
sky
street
stretched
structure
supply
support
technology
town
trace
voltage
watch
wire