 
<translate> Ozi dị mkpa iji zaa ajụjụ a dị n'elu bụ: Ọ bụ ihe e ji ígwè mee - nickel alloy na ụfọdụ ihe ndị dị mfe. Ya mere, azịza ya bụ ígwè - nickel alloy na ụfọdụ ọkụ ọcha. <eng> The relevant information to answer the above question is: It is composed of an iron -- nickel alloy and some light elements.
Therefore, the answer is an iron -- nickel alloy and some light elements. 