ֳʽ
ͼ3-16 ڷһͼ
ͼ3-17 ڷһͼ
˵ڷһһڷһݻƶϸƴ˷ڲṹ䣬湦ܡϸťظǡڡͲͰȲۡͨо˻ѧ¶ֲֳλƣԸʵķʽûϣӲʵֱʹС
19
ֳʽ
ڷ
ͼ3-18 ڷͼ
˵ڷһڷݻƶڸڲṹʵʱλùխСһڷԲͣʹøΪԲΪĻơڻǰڲԲ̣ʹڿɸݰťƶλӵ㹻Ŀռûɨз鷳 ۷
ͼ3-19 ڷͼ
˵ڷһڷʮݻƶһϸֱơϸչʾλáذťǶȵڰťڡ̬ͬʱװýƣ֧ܵƣڳϣûȡʱ⡣
20
ֳʽ
ܷ
ͼ3-20 ڷIJͼ
ͼ3-21 ڷIJͼ
˵ڷһڷݻƶϸֱ̬ڰڶȣӦԲͬоֱת۵ʽƳֲ̬ͬ
21
ֳʽ
3.1.3ڷ ٷһ
ͼ3-22 ڷһͼ
3-23 ڷһͼ
3-24 ڷһͼ
22