... Vmắc tm( )( )cmdDH 32 248 −π Trong đó : H =20 0 (cm) D =Dg -2 = 80 – 2 =78 (cm)Dg =80 (cm) d = 20 (cm)Vmắc tm =( )( )cm3.8 923 88 20 784 20 014,3 22 =− 29 DdHDga. Thể tich ... 27 h1=4,5 (cm) d1= 1,3 (cm)LADCT:Vssn=( ) ( )[ ]( )( )[ ]HhhddddDddDdDHhDhdD +++−−+++++11 2 1 2 21 2 1 2 2 2 3 12 . 12 ππ= [ ]14.83,1108,1889,0.49, 129 .0.07 ,21 12 14,3−++ 2) ... sợi la M = 15,4(cm) D = 20 (cm) D1 =17 (cm) d =6,5(cm) d1 =2, 5 (cm) Vbs = 12 4,16*14,3[ (20 2 +17 2 +20 *17) - (6,5 2 +2, 5 2 6, 52* 5)] Vbs 3884,96(cm) 2) khối lơựng sợi trên búp sợi...