ch3 - 1 2 3 4 5 6 1 2. 1 2 3 3-2 (a) K1 K2 Q L1 3-2 b L2 3...

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Unformatted text preview: 1 2 3 4 5 6 1 2. 1 2 3 3-2 (a) K1 K2 Q L1 3-2 b L2 3 3-3 / / 3-3 3-1 3-1 1. "" 2. 3. 1 1 2 3 4 5 3-4 a / 3-4 b 3-4 c 1 2 3 4 3-4 d 3-4 e 2 3 4 5 3-5 1 2 1 2 3 4 50 "" 60 70 80 90 1950s EAM EAM 1960s 1970s 1980s 1990s PC CAD/CAM UNIX PC PC ( ) 3-7 3-8 ...... ... ...... ... 1. 1 3-9 Q1 Q2 3-9 ......... . 2 IT IT 3 2 1 3-10 T1 T2 0 ( ) 3-10 ......... . 2 IT 3 IT 3 1 3-11 A1 A2 ) 3-11 ......... . 2 IT 3 IT 4 1 IT 2 IT 5 1 IT IT IT 2 IT 6 1 IT IT IT 2 1 2 3 4. ? 1 2 3 4 5 6 4. ? 7 8 9 10 1 2 3 ...
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