Don't see a case of PD carry-over - 回复：请各位大侠出出主意:优先日期CARRYOVER E

since a higher preference is with an earlier PD
http://blog.wenxuecity.com/blogview.php?date=200802&postID=19212#PDtransfer

所有跟帖： 

• 回复：Don't see a case of PD carry-over - 回复：请各位大侠出出主意:优先日期CARRYOVE -jz999- ♂ (46 bytes) () 12/21/2009 postreply 11:18:44