4. Geometrical instruments
  5. Straight-line light ray type
  6. Celestial

Kwok Pun Cheung

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Airborne water diffuser

Fire extinguishers – Mount – cabinet or guard – Movable relative to fire
Reexamination Certificate

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Universal heliodon-sundial

Geometrical instruments – Straight-line light ray type – Celestial
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Universal solar chart shadow plotter and method for plotting...

Geometrical instruments – Straight-line light ray type – Celestial
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2454093

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