219page

^l|1tr +alel r Et= 2O7 4ql. at "; a+0s.!ol €4aJ4. trB 10-151y r7,/osn* El+-J a+ +EE +* tt4E (a)E *rg +"1. Col.rll 'J4€ al.*nl (fzltt)-a gq 9.1-7, (b)= HqB + + +==4ql= olfz| olul ,ll+ t+t a+a+49 4= aL*nloltrl. tr? 10-161r+ ?ol SnZOo/o€ B+6J a++Eg Hirl =d 6IE olpl .JpBol a*0 *49 {} al.*xi) =zl o-tr 94. trH 10-171 2 cul3.zo/o snz6.8o/o4 atgE B sl =d+ 49E a+a$!=zlg ,*. =4 ol4. atol zlzl=_ qq gl94 €zlql F= € E= 'JAl =q t E oJ 5etr al.*nl zl a4e+. trB 10-1819 3\o/osn* ts++ +*4 Etigtr F=€E Dr*nle+ a+D*49 ,)= aa$;{ =zloltr}. flaql el6}q p E= ztol dg"l^j. €ztlp f fltr}. 20o/o Sng -J++ aFg 550c-tr+El +ts6t8 tr? 10-1ele+ Ag =zl ol €+. ol =!g +^I ulullzlol = zlzl4l €4lalE Elg +EE a_]*nl =4ol rJ. a+a+4 os 9E z-z+{E *4Ea]]zI 9zrl94 A4 aJ.*nl elql dolr! ol 4eltrl. ol ezl 5ol+ Euls.g=o1 aa+ +E e^J u|_rllzloltre+ +^I6Iq olq+ ++el a :.aJ 10-16 CuB0% Sn20% EE( x 100) ral 10-18 Cu70"/" Sn30o/o g=( x 100) ral rc-fl Cu73.2"/" Sn26.8% gEi(x1,500) :.aJ 10-19 Cu80% Sn20o/" gE( x 500)