3. DISASSEMBLY AND REASSEMBLY
········································
·······································
·································
······································
·································
···································
·······································
································
·································
·······································
·····································
····························
····························
·····························
·····························
·····································
···································
·····································
······························
·······························
·······························
······································
·······················
·······················
·····················
··························
··························
20
21
22
24
25
25
26
27
28
28
29
30
32
32
33
33
34
35
36
37
38
39
40
40
41
41
42
45