Document Type and Number:
Japanese Patent JPS57142496
Kind Code:
U
Application Number:
JP2784581U
Publication Date:
September 07, 1982
Filing Date:
February 27, 1981
Export Citation:
International Classes:
G11B33/10; G01R19/165; G11B27/36; (IPC1-7): G11B27/36; G01R19/165