37% lead and 63% tin

50% lead and 50% tin

70% lead and 30% tin

58% lead and 42% tin

straight polarity is used

reverse polarity is used

polarity is the choice of the operator

for selecting polarity, data insufficient

the torch is traversed by power and is guided manually

the torch is traversed manually and is guided by power

both torch movement and guiding are done by power

both torch movement and guiding are done manually

width 12 mm at the hinges and 6 mm at the outer tip

width 6 mm at the hinges and 12 mm at the outer tip

width 10 mm at the hinges and 5 mm at the outer tip

width 5 mm at the hinges and 10 mm at the outer tip

drill equidistant holes on a circular flange

manufacture components of awkward shape

drill components with blind holes

None of the above