Motor generator set
Engine generator set
Rectifier set
Welding transformer
Positive 2/3 and negative 1/3
Positive 1/3 and negative 2/3
Positive 3/4 and negative 1/4
Positive 1/4 and negative 3/4
Flat
Vertical
Horizontal
Overhead
diameter of its core wire
diameter (overall) of electrode
thickness of flux coating
length of electrode
to increase welding current
to stabilize the arc
to prevent rusting
to control arc temperature