Document Type and Number:
Japanese Patent JPH02124987
Kind Code:
U
Application Number:
JP3294189U
Publication Date:
October 15, 1990
Filing Date:
March 23, 1989
Export Citation:
International Classes:
E01B25/22; B61J1/10; B66C7/12; (IPC1-7): B66C7/12; B61J1/10; E01B25/22
Domestic Patent References:
| JPS6347293A | 1988-02-29 | |||
| JPS5010994B1 | 1975-04-25 |