Document Type and Number:
Japanese Patent JPH0226611
Kind Code:
Y2
Application Number:
JP6289887U
Publication Date:
July 19, 1990
Filing Date:
April 24, 1987
Export Citation:
International Classes:
B24B31/023; B24B31/033; B24B31/12; (IPC1-7): B24B31/023; B24B31/033; B24B31/12