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with liquid-filled chambers
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CPC
F21V9/12
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Parent Industries
F
MECHANICAL ENGINEERING LIGHTING HEATING WEAPONS BLASTING ENGINES OR PUMPS
F21
Lighting
F21V
DETAILS OF LIGHTING DEVICES, OF GENERAL APPLICATION
F21V9/00
Light filters Selection of luminescent materials for light screens
Current Industry
F21V9/12
with liquid-filled chambers
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