can I file Perm based EB1b and EB2 simultaneously?

Can I file PERM based EB1b and EB2 at the same time, without influencing each other? Many posts talk about NIW and EB2 not affecting each other, but there is not a clear answer regarding EB1b and EB2.
Thanks for any feedback.

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EB-1b requires no PERM - 回复:can I file Perm based EB1b and EB2 s -pjiang- 给 pjiang 发送悄悄话 pjiang 的博客首页 (174 bytes) () 02/11/2008 postreply 13:57:02

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