4. Optics: measuring and testing
  5. By polarized light examination
  6. With birefringent element

Hakan Bergstrom

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Device and method for measuring birefringence in an optical data

Optics: measuring and testing – By polarized light examination – With birefringent element
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Process for the preparation of sulfide-free alkali liquor using

Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With regeneration – reclamation – reuse – recycling or...
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