Von Hofe modified eyepiece
冯霍夫改进型目镜

• fraction order
• fraction scannign
• fracture
• fragility
• fragment
• frame
• frame camera
• frame counter
• frame finder
• frame frequency
• frame grabber
• frame level
• frame photography
• frame processing
• framer
• frame rate
• framer per second
• framework
• framing camera
• framing lens
• framing photography
• francium
• Franck-Condon overlap factor
• Franck-Condon potential
• Franck-Condon principle