2021202211.1.060220d=1.060cmsinFmg2212mdLFt12E11 R2 1 90 2 130222060 2R26VE10mA13VE1E10mA13.12233lR1tan21322AB 233lR141211tcossinmgmgma 11vat 12t212vxa112lxvt 1112x11xvtx1QcosQmgx1EpkEEEQ1psinEmgL11115.12q1Cv22m/s3s2m (1)aav v1aa1E=BLv 1 1 1(2)v12m/s 1 1q 1 q1C 1mvmv1mv2 2v22m/s 1(3)bb2Q1mv2 2Q10.5J 1s 1 2BLvIR 1 1 s2m 1
