Many authors have proposed effi cient models to predict cut-ting forces in milling operations. Some experimental resultsare available for steels [2–15], aluminium alloys [14–18], zinc alloys [19,20] or aeronautical alloys [6,21–23]. However, the

ZPG磷锗鋅角度Ｉ类匹配计算与研究，实现中红外激光输出-ZPG zinc germanium phosphide angle class I matching calculation and research to achieve mid-infrared laser output