RF cleaning-ring laser gyro
射频清洁环形激光陀螺

• flat inclined mirror
• flat interferometer
• flat key
• flat lapping block
• flat-layer powder camera
• flat machine
• flat mirrors
• flatncess of field
• flatness of image plane
• flatness testers
• 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