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bifocal periscope meaning in Chinese

双焦距潜望镜

Related Words

  1. bifocal
  2. bifocal segment
  3. bifocal tube
  4. bifocal ophthalmoscope
  5. bifocal slasses
  6. pantoscopic bifocal
  7. bifocal lens
  8. bifocal glass
  9. bifocal spectacle
  10. fused bifocal
  11. bifocal pacing
  12. bifocal pacing mode
  13. bifocal segment
  14. bifocal slasses
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