Document Type and Number:
Japanese Patent JPS5289803
Kind Code:
U
Application Number:
JP17959675U
Publication Date:
July 05, 1977
Filing Date:
December 26, 1975
Export Citation:
International Classes:
E21D9/06; E21D9/08; E21D11/00; F16L1/00; (IPC1-7): F16L1/00; E21D9/06
Domestic Patent References:
| JPS523215A | 1977-01-11 |