K_ic NFMRM FBHBF5 Kmbcj K ? 5 . NFMRM S AMKNJCRC BGQKMSLRCB PC?P PSLLGLE EC?P H?D H?ú/O2FQ+/3-, NFMRM T DPMLR @P?IC NFMRM X1 QRCCPG LE EC?P@MV 66+HSJW+/6+0/ 66+HSJW+/6+/3 66+HSJW+/6+10 Lm Fmkm, ? + 3 1 1 2 / 2 ∞ . / Cq N_ec 4 - / . K?5.&5K+ERC'+0