... KN3,88N8 829 02. 2 3.9810P 2 1== ióứm õỷt: i qua troỹng tỏm cuớa bióứu õọử: caùch õốnh m23.3 2 h3 2 1== - Phờa haỷ lổu : N1415 02. 2 2,19810b 2 h.9810b P 2 2 2 22 ==== ióứm õỷt: hD2 ... ()b.hhh 2 hh.b W.P 2 12 2 21 ZZ+=== ()KN6,41N3,41 620 1.8 2 3.98101. 123 . 2 21.9810 2 2==+= ióứm õỷt: Caùch õaùy lồùn: m25,1 12 1 .22 .8.31bBb.2B.h.31l =++=++= - Tờnh hồỹp ... h1=1mhD=1,55h 2 = 2 m Âiãøm âàût : åí âáy zDx ≡ hDx ( )()() 2 12 2 12 12 3 12 21hh.hhbhh.bhhh.IhzhXXXXXCXCCDD+−−++=ω+== ()()m,, .55118151 2 2111 12 121 2 213≈+=+−++=...