Document Type and Number:
Japanese Patent JPS5567296
Kind Code:
U
Application Number:
JP15022679U
Publication Date:
May 09, 1980
Filing Date:
October 31, 1979
Export Citation:
International Classes:
E21D11/08; (IPC1-7): E21D11/08
Domestic Patent References:
| JPS5212733A | 1977-01-31 | |||
| JPS5088830A | 1975-07-16 |