Raws li ib txwm muaj, nws yuav tsis deformed. Qhov yuav tsum tau ua ua ntej rau kev deformation yog tias aluminium phaj tsis tau raug kho tom qab dov lossis casting? Puas yog tempering tau ua los txo kev ntxhov siab? Yog tsis yog, nws yuav twv yuav raug hu deform, thiab yog tias tempering yog nqa tawm, nws yuav tsis deform.
