Document Type and Number:
Japanese Patent JPS5712675
Kind Code:
Y2
Application Number:
JP6042077U
Publication Date:
March 13, 1982
Filing Date:
May 12, 1977
Export Citation:
International Classes:
E04F13/21; E04F13/08; E04F13/12; (IPC1-7): E04F13/08; E04B1/40