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guolina1218
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Сľ³æ(½ð±Ò+0.5):¸ø¸öºì°ü£¬Ð»Ð»»ØÌû½»Á÷
linghanyuan(½ð±Ò+1,VIP+0):лл½»Á÷ 11-7 14:55
Сľ³æ(½ð±Ò+0.5):¸ø¸öºì°ü£¬Ð»Ð»»ØÌû½»Á÷
linghanyuan(½ð±Ò+1,VIP+0):лл½»Á÷ 11-7 14:55
| the presence of the characteristic peak of methylene (C-H) was not only at 1400 cm-1 but also at 1800 cm-1 in the infrared spectrograms |

2Â¥2009-11-06 08:57:38














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