Document Type and Number:
Japanese Patent JPS57141492
Kind Code:
U
Application Number:
JP2638681U
Publication Date:
September 04, 1982
Filing Date:
February 25, 1981
Export Citation:
International Classes:
H04R9/02; F28D15/02; F28F3/02; H04R9/06; (IPC1-7): H04R9/02; F28F3/02; H04R9/06