Document Type and Number:
Japanese Patent JPS5238638
Kind Code:
B2
Application Number:
JP4381773A
Publication Date:
September 30, 1977
Filing Date:
April 17, 1973
Export Citation:
International Classes:
E04F21/00; B24D99/00; B28D1/26; E01C23/08; E01C23/088; E04F21/24; E01C23/00