Warning: file_put_contents(): Only 0 of 4987 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/69228.com/index.php on line 55 大地资源中文在线观看官网,开心五月激情婷婷久久,亚洲成a人片在线观看88
The role of the space charge wave is that it makes bunching reduce at small signal, but it makes bunching enhance at large signal. 并且分析了空間電荷波對電子束群聚的影響:在小信號時使群聚減??;在大信號時使群聚增強(qiáng)。