1/6180164ABCDEFRP6Prr___________(4)OBDCExHA602/68OHCO60ABCDHCADmACEACl:132ACB55rRCAdd510OA0rOAO1BO1BOBO1B2r132710AmrB2m301426r23/68mrO2rmOAOOAOA1O32O510lABv11525BABA30OA4/620OBDm2b601AB4BDB430A620.5,A(612ABCDABCDABl=300mmd=40mmb=20mmh=40mmE=210GPaG=84GPaDFM1M=1KNmF=0KNAB1=2DD=32M=1KNmF=1KNABr3=3DwD=411DBEADF1DBFcr=22DBEII=Aa2Fcr=432CDBCD5/6x0ax=x0/a56ABLqnn1n2k-1kA222n2k-1k28AB4a0PCDA'B'PEIa10=32AA=230CD2a38Mz1maxh=42h=46/610TABd=8cml=1mE=200GPa=0.25CDPAabyxy45a=-2510-6b=7510-61P(2)(2)(3)2a=(3)12DdGaGcK451Ga=Gc=Gm=2=22GaGcm=4=48EIPCPhC1C523