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(+ g = ^J) 1. riE Eul= -dtrl- (zt) 7q +€g =Hlf,trI. (4 =q ?€g zt€-B -e.zl* E= ='rl ilr+. z. AF:d= I1l+-zl.rl. (z]) +4]€ =€olzl 'H++ ,JY+. (I]) +=Hltg €e{}r+. (u? 3 +a) 3. 6l:d= rll+urtl. PD e4€ =€rlzl .rl+r+ ,)tr+. 4. = .ol( oore) = xll+-Lltrl (4 =ol= 4l z16}= uJBql= CO,R, Bdl(pep set)S, g*fzl(furan resin)fl, d -zol(sheIl core) S 5. "l 9l +. (4 ='q al 4"1 +d7 H,}qlr]r E*ol ^I+sl= d =ol==- zI 416Iz15- *rt. (q) ?El-u- 4!-c{coated sand)= gA$rJ fzlolz'l "ll Eql = .ol-,,€9 7Ig-6Iq"I oJ+, (zH 4 +4) F+=.q?€9soo 3socrlaAl .rl .!al 7l 6Iq = .EIE 4[_=_= f €+sE *=+. FD =qel z4tt"l glzJaq"l qflg qlcl ?q?B ql^] E7l6l-q 4zl€. eJEe+. (zH 5 +t') s. aol= E^l-dtr|. (4 = .qel il+= +a url +"J6Ir zlsul Eq +El fzl oe=ol Efl.eQl €;<ltul. (zH 6 +=) (1-l) *+ ?q_E +g }lJH o,tr- €il++. FD =q Ed"l Ll,zl 9*E+ +el6}q €-:l= e}-s+tr| 6. +tr= :sr.g_Ltrl. 14 +E*++= ulzlalzl fla}q =.ol Tl+41 tr_ + € Eal= tseif,4. (4 tI . 6I€ .J"Jdg +"J61'3^l El€g s-s+tr}. (rr) +q +"J =Hl= .Jtr1. r _ a 3 =^l^l HJtsel +='Jgf cl a _ zJ 4 n ol =-d 7lg "t acl^ll+ I. a{ 7€ ra s nol =:d :. d -zol "! g aGl E-s r.al 6 aGl tr^l -57 -