Document Type and Number:
Japanese Patent JPS52170403
Kind Code:
U
Application Number:
JP7895376U
Publication Date:
December 24, 1977
Filing Date:
June 18, 1976
Export Citation:
International Classes:
E01B3/40; B28B23/00; E01B3/38; (IPC1-7): E01B3/38; B28B23/00