一、通电螺线管绕线1.弄清空间方位部分同学刚开始学习时不能理解、常出差错,除少数同学因知识基础不牢固外更多的同学就是因为空间概念不强,方位不清造成的.所以要学好这部分知识,首先要弄清方位.如图1所示的立体方位:如图2所示的平面方位:实际上只要把书本或试卷拿着竖起来, First, energizing the solenoid winding 1. Find out the orientation of space Some students can’t understand and often make mistakes when they just started to learn. Except for a few students who have a weak knowledge base, more students are because the concept of space is not strong and the orientation is not clear. Therefore, to learn this part of the knowledge, we must first understand the orientation. The stereoscopic orientation shown in Figure 1: Plane orientation shown in Figure 2: Actually, as long as the book or test paper is held up,