请问怎么鉴别有放射性材料，含铅，有毒物质呢?

来源: 窗户于 2019-01-05 04:24:04 [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.

Change Ad Consent