4. Optics: measuring and testing
  5. For light transmission or absorption
  6. Of fluent material

Ralf Hemel

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Measuring the degree of dispersion in flowing suspensions

Optics: measuring and testing – For light transmission or absorption – Of fluent material
Patent

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Process for controlling the addition of retention aids in paperm

Paper making and fiber liberation – Processes and products – With measuring – inspecting and/or testing
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Production of paper, board and cardboard

Paper making and fiber liberation – Processes and products – Non-fiber additive
Reexamination Certificate

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