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Application filed by Nl N V Philips GloeilampenfabrfiledCriticalNl N V Philips Gloeilampenfabr
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Publication of DK57838CpublicationCriticalpatent/DK57838C/en
DK57838D1936-07-131937-07-10
Procedure for staining an oscillating trace, especially tone traces, and a carrier for use in the procedure.
DK57838C
(en)