Document Type and Number:
Japanese Patent JPS57180501
Kind Code:
U
Application Number:
JP6664081U
Publication Date:
November 16, 1982
Filing Date:
May 11, 1981
Export Citation:
International Classes:
A01B33/02; A01B33/00; A01B39/16; (IPC1-7): A01B33/00; A01B39/16