infrared films and plates
红外线底片及感光板

• flat pack
• flat plate
• flat polisher
• flat reflector
• flat-roof mirror
• flat saddle key
• flat spring
• flat spring hinge
• flat surface
• flattened field
• flattener
• flattening lens
• flatter surface
• flat tool
• flat topped pulse
• flatuess
• flatuess and straighness measuring instrument
• flaw
• fleck
• flexibility
• flexibility factor
• flexible 1
• flexible cord
• Flexible diagnostic Fresnel lens
• flexible drive