Document Type and Number:
Japanese Patent JPS57180502
Kind Code:
U
Application Number:
JP6718981U
Publication Date:
November 16, 1982
Filing Date:
May 08, 1981
Export Citation:
International Classes:
A01B33/02; A01B33/00; A01B35/00; E02B11/02; (IPC1-7): A01B33/00; A01B35/00; E02B11/02
Domestic Patent References:
| JPS4327614Y1 | 1968-11-15 |