double-focus X-ray tube 双焦点X射线管
double-focus interferometer 双焦点干涉仪 ; 双重线精细结构
double focus interference microscope 双焦点干涉显微镜
double focus tube 双焦点球管 ; 双焦点管
double-focus 双焦
Double Dynamic Focus 双倍动态聚焦
Moreover a devise idea is put forward that hologram incorporates object lens that can adapt to the Panasonic's Double focus and give credible technologic guarantee and carry out product's simplification. In the information society, the new technique come on constantly.
后半部分对DVD的核心部分——激光头的工作原理及其满足高密度和兼容性要求的实现方法进行了详细阐述，并提出了适应松下两焦点光头的全息板与物镜一体化设计思想，为产品简单化的追求提供了可靠的技术保证。
参考来源 - DVD视频压缩技术及激光头的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Man is not a circle with a single centre; he is an ellipse with a double focus.
人并不是只有一个圆心的圆圈；他是一个有两个焦点的椭圆。
Stationary anode, double focus, and bridge silicon rectification, The X-ray generator is an oil-immersed self-cooled unit.
固定阳极，双焦点，桥式硅整流，油浸自冷组合式。
The morning training took on a double focus with a light session in the gym for those that played last night and the rest of the group working outside.
晨训分两组进行，那些在昨晚比赛的球员在健身房进行放松训练，没有上场的球员在室外训练。
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