Document Type and Number:
Japanese Patent JPS5425732
Kind Code:
U
Application Number:
JP9915977U
Publication Date:
February 20, 1979
Filing Date:
July 25, 1977
Export Citation:
International Classes:
E21D9/06; E21D9/12; (IPC1-7): E21D9/12
Domestic Patent References:
| JP49080509B |