Document Type and Number:
Japanese Patent JPS6431105
Kind Code:
U
Application Number:
JP12444987U
Publication Date:
February 27, 1989
Filing Date:
August 14, 1987
Export Citation:
International Classes:
E01C11/26; E01H5/00; G05D23/19; (IPC1-7): E01C11/26; E01H5/00; G05D23/19
Domestic Patent References:
| JPS5018299A | 1975-02-26 | |||
| JPS53111623A | 1978-09-29 |