Document Type and Number:
Japanese Patent JPH0231656
Kind Code:
U
Application Number:
JP10988388U
Publication Date:
February 28, 1990
Filing Date:
August 22, 1988
Export Citation:
International Classes:
B24B31/12; (IPC1-7): B24B31/12
Domestic Patent References:
JPS62114869A | 1987-05-26 | |||
JPS6053458B2 | 1985-11-26 |