2
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................................................................................. 58
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................................................61
..............................................................63
...............................................................................64
..............................................66
.......................................................66
................................................................................................68
2.20.1 Aperture ....................................................................................... 68
................................................................................. 69
...............................................69
................................................................... 69
...................................................................... 69
..................................................................... 69
...................................................... 71
.................................................. 71
2.21.6 Gears drum removal .................................................................... 71
........................................................................... 71
.................................................................. 72
............................................................ 72
INDEX