Document Type and Number:
Japanese Patent JPH01105621
Kind Code:
U
Application Number:
JP19994887U
Publication Date:
July 17, 1989
Filing Date:
December 28, 1987
Export Citation:
International Classes:
E01H5/04; E01H5/09; (IPC1-7): E01H5/04; E01H5/09
Domestic Patent References:
| JP62200718B | ||||
| JP62154022B | ||||
| JP61206716B |