英文關鍵字
brazing
circuit
close
communication
commutator
components
desk
electric
electrical
electrician
electricity
electronic
equipment
exchange
fix
fusible
handle
hands
industrial
industry
insulating
iron
isolated
lead
man
men
parts
repair
roll
switch
tech
technical
technology
tin
tool
transmitter
valve
welding
wire
wires
wiring
work