what is the purpose of LUD for I-485

Anyone know what is the purpose of LUD? my latest LUD on I-485 was Jan 25. what is that mean? I would like to know what is procedure behind the scene.
anyone knows, please share.
thanks in advance

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回复:what is the purpose of LUD for I-485 -xxj100- 给 xxj100 发送悄悄话 (221 bytes) () 01/30/2007 postreply 13:46:47

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