英文關鍵字
background
brazing
cable
chip
circuit
close
copper
cutout
dough
electrical
electronic
element
energy
engineer
equipment
flux
gun
hand
handle
heat
holding
hot
human
industry
instrument
iron
isolated
lead
man
melting
metal
plug
power
repair
silver
solder
soldered
soldering
solderingiron
spool
steel
technical
technology
temperature
tool
welding
white
work