英文關鍵字
afternoon
amper
arm
cable
caution
copter
danger
day
daylight
distribution
electric
electricity
energy
fly
gopro
green
high
line
metal
moscow
network
outdoor
outside
phantom
pole
power
quadrocopter
russia
steel
structure
summer
supply
technology
tower
transmission
tree
volt
voltage
warmth
watt
wire