Document Type and Number:
Japanese Patent JPS63198606
Kind Code:
U
Application Number:
JP8676587U
Publication Date:
December 21, 1988
Filing Date:
June 05, 1987
Export Citation:
International Classes:
E01C23/16; E01C23/20; E01C23/22; E01C23/24; (IPC1-7): E01C23/16
Domestic Patent References:
| JPS5839585A | 1983-03-08 |