Title:
HOLLOW SPHERE AND ITS PRODUCTION METHOD
Document Type and Number:
Japanese Patent JPS52110223
Kind Code:
A
Inventors:
YAMAOKA HIROSHI
OOHASHI MICHIO
OOHASHI MICHIO
Application Number:
JP2743676A
Publication Date:
September 16, 1977
Filing Date:
March 12, 1976
Export Citation:
Assignee:
SUMITOMO METAL IND
International Classes:
B22D13/02; B22D13/04; B22D13/06; B22D25/02; (IPC1-7): B22D13/04