| | | 50 / | | | | | | 1. 20℃ | | 2. | | 3. 4 | | 4. | 5~6 | | | | | 1. | 2% | 1.5% 10~15 2~4 | | 2. | 1%~2% | 2% 1~2 | 3. | 0.3% | 10% 2% | 3~4 | | 50 |