rac:ic kie'u
may da dtWc dti t.if.'ncon s6 thu:Ong thu:bng chi sl,i bie'n the' nl.adtc mliu nuiy cDo chinh x�i.t: clut 1miy ctuac ky' hieu nhu :::au:H - d6 chinh x�k blnh thu:b"ng; n - di) chinh xac nang cao; B - di) chfnhxVt'1idfJ ehinh xH.c nlt cao; C - d¢ chinh xic di.tc biet cao.Cfic mfiy[r]