The γ phase composition limit and the carbon content width in two phase WC-Co cemented carbides were derived according to the relations among all phases in aloys.

依據WC－Co硬質合金各相含量間的關系，推求出兩相（WC＋γ）合金中γ相成分極限和碳含量寬度。

STEVE EMBER: The lithographic process was invented in the late eighteenth century by the German writer Aloys Senefelder.

平版印刷工藝是在18世紀末，由一位名叫阿羅斯·塞尼菲爾德的作家發明的。