Dual-focus tube

... dual processor双信息处理器 Dual-focus tube双焦点管 dual citizenshipph.1. 双重国籍 ...

 focus tube

双焦点球管 double focus tube 双焦点管 Dualfocus tube ; focus tube ; bifocaltube 双焦点眼镜 bifocal glasses ; bifocal spectacles ; pantoscopic spectacles ; divided spectacles...

 double focus tube

... 双曝光干涉术 double exposure interferometry 双焦点管 double focus tube 双聚焦质谱仪 double focusing mass spectrometer ...