Document Type and Number:
Japanese Patent JPS5280504
Kind Code:
U
More Like This:
Application Number:
JP16882675U
Publication Date:
June 16, 1977
Filing Date:
December 12, 1975
Export Citation:
International Classes:
E21D9/06; F16L1/00; (IPC1-7): F16L1/00
Domestic Patent References:
| JPS4938006U | 1974-04-04 |