| | | | | | | | | | | | | | 3 10 | | | 4 | 8 1 | 3 | | 20 | 20 | 20 20 6 | | 600 | | | 3 | | | | | | | | 2.0~4.0D | 3 0.021 | 0.2 2 0.4 3 0.6 4 0.8 5 1.0 | | 6 1.2 | | IPAD | | | | 4 | 1. | | | 2. | | 3. | | | | 4. | | | |