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RING FOR SUPPORTING THE SPIRAL FILAMENT OF GAS-FILLED INCANDESCENT LAMP WITH TUBE-LIKE ENVELOPE FLATTENED ON BOTH ENDS AND METHOD FOR MAKING THE SAID RING AND FOR PUTTING THE SAID RING INTO THE ENVELOPE
RING FOR SUPPORTING THE SPIRAL FILAMENT OF GAS-FILLED INCANDESCENT LAMP WITH TUBE-LIKE ENVELOPE FLATTENED ON BOTH ENDS AND METHOD FOR MAKING THE SAID RING AND FOR PUTTING THE SAID RING INTO THE ENVELOPE