// shaft
solidpen 192 192 192 5
moveto -20 20
lineto 100 20
// dc ac
solidpen 0 0 0 0
moveto 20 80
lineto 20 40
lineto 40 20
moveto 40 80
lineto 40 20
moveto 60 80
lineto 60 40
lineto 40 20
rectangle 0 60 80 160
moveto 0 60 
lineto 80 160
label 30 140 DC
label 50 80 AC
label 90 154 ω
ellipse 25 5 55 35
textcenter 40 20 M/G
roundrect 70 132 90 148 3 3
label 80 140 PI
moveto 95 138
lineto 90 140
lineto 95 142

roundrect 52 130 78 150 3 3
label 66 140 PI