\ro.\r4 = ^ ²2 =[90 ³4 - ´ 8¬ s )x(0 1893a)J = 188 9 /\rV ?W X Y " [ = * '\r' 64 12 64 12 13\rBC\r15-7(1-16 FGhmt20aµar&ab 2¶·¸ m %&'() ¹¤\r/>Mk2¼mµ&½N“A$¿ À\r 20aµ SÁÂ& 6% à ª &'()* & ) =1.78x10'm m \rI>O =1.28X 10 m m ÇÈ $ 4)= 2883mm2 . µÉ|S 6%Ê&N~*\rx0 = 20.1mm\rËÌ'()0ÍX8¤./%012ab X, ¨%\r4 = 2 Î + 2 % + %)2\r¶ 4 Ð\r22,0 = 248+ 2 4 ( ? + à y\rk}m#ÒÓ 2 , ÔÕÖ×Ì25.\r1.78xlO7 = 1.28X106 + 2 8 8 x 0 + 20.1)2\r(3 + 20.1) = J " 8 “ 28)X106\r= 75.6\rK* 2 V 2883\r> 2mµMN\ra = 2(75.6-20.1) = 111mm\rBC
全文预览
