Document Type and Number:
Japanese Patent JPS57180532
Kind Code:
U
Application Number:
JP6871781U
Publication Date:
November 16, 1982
Filing Date:
May 13, 1981
Export Citation:
International Classes:
A01F12/30; A01F12/32; A01F12/44; (IPC1-7): A01F12/32; A01F12/44