Document Type and Number:
Japanese Patent JPS56155253
Kind Code:
U
Application Number:
JP5326580U
Publication Date:
November 19, 1981
Filing Date:
April 21, 1980
Export Citation:
International Classes:
F24J2/52; E04D13/00; E04D13/18; (IPC1-7): F24J3/02; E04D13/00