回复：回复：各位老师求助（pijiang,xiao bai tu 或其他高人）：雇主能在多长的期限内撤对你的销绿卡申请？

mylawyer: you said above: "ER has no power to revoke your GC petition (I-140)." should be "ER has no right to revoke your GC petition (I-140)."
So you seems need to improve your english before answer people's question here.