Draw the main centerlines and block in the general outline of the views with light, sharp 6h pencil lines.
用轻细的6 H铅笔线绘制主要的中心线和视图大体的轮廓框。
2
The coupling properties of an inclined narrow slot on the centerlines of the broad walls between two crossed rectangular waveguides are discussed by means of the moment method.
本文用矩量法讨论两个正交矩形波导宽边上中心窄斜缝的耦合特性问题。
3
Six identical triangles can be formed by drawing two straight lines through an octagon's center point.