spie·gel·ei·sen /ˈspigəˌlaɪzṇ/
  鏡鐵
  Spie·gel·ei·sen n.  See Spiegel iron.
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  spiegeleisen
       n : pig iron containing manganese; used as a deoxidizing agent
           and to raise the manganese content in making steel [syn:
           spiegel, spiegel iron]