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Originally posted by 诚实可靠小郎君~ at 2005-7-30 06:49 PM:
http://www.djds.de/chemie/

强啊,你都哪里找的

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Originally posted by 阿竹 at 2005-7-30 08:39 PM:

强啊,你都哪里找的

以前用到了,就收藏了,呵呵

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再专业一点儿呢,就去
www.webelements.com

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