2.ҵԴ
ûϴԴڡҵԴʾԴ⡢ʽΧļСϴڵԴϢԸԴ״̬鿴Դб༭ԤɾȲͬʱҲ֧ϴԴ
1ݸ
δԴʾڡݸ䡱УûԶԴб༭Ԥءɾȣ֧ԴԶתƵСԴб¡
ͼ2-6 ݸ
2
ѷύˣδ˵ԴʾڡС ûԤԴҲԱ༭Դ·Դ˺ԶתƵδͨͨԴб¡
20
ͼ2-7
3δͨ
˲ͨԴʾڡδͨʾͨԭûԤԴҲԱ༭Դԡ·ɾԴ
ͼ2-8 δͨ
4ͨ
ͨԴʾڡͨûԲ鿴ԴҲԱ༭ԴԺɾԴ
21
ͼ2-9 ͨ
ؼ¼
عԴʾڡġ-ؼ¼ûԲ鿴ԴҲɾصԴ
ͼ2-10 ؼ¼
22
ģҵղ
ղعԴʾڡġ-ҵղءûԲ鿴ҲɾղصԴ
ͼ2-11 ҵղ
壩Ϣ
Ϣʾǵ½ûĸϢϢͷҵĻ֡
1.Ϣ
Ϣʾûʵڵλû͡ע˴ģ
23