Impurity doped during epitaxy will diffuse in the epitaxial layer and even into the substrate.在半导体器件制造的外延工艺中,外延生长时通常要掺入杂质.A high Er ~ ( 3 + ) - doped narrow linewidth fiber laser based on fiber Bragg grating ( FBG ) Fabr...
She smiled, politely rather than with tenderness or gratitude.她只是出于礼貌地笑了笑，而非出于关心或感激。The audience are strangely subdued, clapping politely after each song.观众们出奇地安静，只是在每首歌结束后报以礼貌性的掌声。"Here's the taxi," she said polite...
Hypoid gear transmission is the most complicated transmission. The parameters of ma - chinking are hard to cakulate.准双曲面齿轮是齿轮传动中最复杂的, 其工艺锥参数和加工调整计算都涉及两个相错圆锥的相切接触条件.Fixtures are generally mechanical devices used to assist...