| | | 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 | | | |