haih..apsal la susa sgt nk msuk+paham stdy heat transfer ni...aduhh...kang jd cm test ag..stdy bagai nk rak..last2 xdpt jwb jgk...adoyai...pntla mak..iktkn aty mls je..nseb bek aby kte dtg td....adela smgt sket..wee!!tq aby!!