Document Type and Number:
Japanese Patent JPS6417486
Kind Code:
U
Application Number:
JP11128287U
Publication Date:
January 27, 1989
Filing Date:
July 22, 1987
Export Citation:
International Classes:
E02D1/02; G01V3/12; G01V3/30; (IPC1-7): G01V3/12; E02D1/02
Domestic Patent References:
| JPS5051001A | 1975-05-07 | |||
| JP38017801A |