Document Type and Number:
Japanese Patent JPS63198605
Kind Code:
U
Application Number:
JP8967387U
Publication Date:
December 21, 1988
Filing Date:
June 12, 1987
Export Citation:
International Classes:
E01C23/14; E01C23/00; E01C23/12; (IPC1-7): E01C23/00; E01C23/12
Domestic Patent References:
| JPS5030119U | 1975-04-04 | |||
| JPS6027115B2 | 1985-06-27 |