standard
(1)标准
(2)标准器
(3)标准的
(4)机架

• Faunhofer diffractin
• Faunhofer holography
• Faunhofer intensity distribution
• favorable interference
• F-band
• FBT Fly Back Transformer
• f-center lasers
• FDDI network equipment
• feather
• feathers
• featureexraction
• feature extracton
• febetron
• fechnerratio
• feed
• feed arrangement
• feedback
• feedback amlifier
• feedback circuit
• feedback compensation
• feedback-controlled optics
• feedback control system
• feedback ratio
• feeder
• feed spool