roundrect 0 0 150 110 5 5 
polyline 10 80 130 80
solidpen 192 192 192 0
polyline 70 5 70 80
polyline 20 5 20 80
polyline 120 5 120 80
*
polyline 45 5 45 80
polyline 95 5 95 80
label 20 90 0
label 120 90 Ts
label 70 90 Ts/2
*
label 140 20 α
label 140 40 β
label 145 90 tr