Document Type and Number:
Japanese Patent JPS5677551
Kind Code:
U
Application Number:
JP16074580U
Publication Date:
June 24, 1981
Filing Date:
November 12, 1980
Export Citation:
International Classes:
E02D19/10; E02D19/06; E21D9/06; (IPC1-7): E02D19/06; E21D9/06
Domestic Patent References:
| JP44020577A | ||||
| JPS5065012A | 1975-06-02 |