The three wires were fed from the three spools and wound as one wire; thus comprising the trifilar terminology. 三条线从三个线轴出来绕成一条线，从而符合三线并绕的要求。
Figure 1 is the schematic diagram of the trifilar output transformer and shows the relative connections of the windings. 图一显示了三线并绕输出变压器的原理图，以及各绕组之间的连接情况。
