Document Type and Number:
Japanese Patent JPS4899070
Kind Code:
U
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Application Number:
JP2352472U
Publication Date:
November 22, 1973
Filing Date:
February 28, 1972
Export Citation:
International Classes:
H01J17/40; H01J17/16; H01S3/03; (IPC1-7): H01S3/03; H01J17/16