Document Type and Number:
Japanese Patent JPS4922733
Kind Code:
U
Application Number:
JP6368172U
Publication Date:
February 26, 1974
Filing Date:
May 30, 1972
Export Citation:
International Classes:
E01C11/22; (IPC1-7): E01C11/22
Foreign References:
| GB513358A | 1939-10-10 |