英文關鍵字
cable
connector
metal
technology
screw
tool
plug
adapter
equipment
jack
electrician
connect
construction
site
employee
finger
twist
wire
network
small
detail
element
connection
workshop
fix
electrical
install
fasten
fitting
part
contact
electronic
frequency
radiation
repair
telecommunication
component
device
industrial
system
electricity
insulation
people
closeup