Document Type and Number:
Japanese Patent JPS54109207
Kind Code:
U
Application Number:
JP3696877U
Publication Date:
August 01, 1979
Filing Date:
March 26, 1977
Export Citation:
International Classes:
E01B25/10; E01B25/08; (IPC1-7): E01B25/08
Domestic Patent References:
| JPS4939104B1 | 1974-10-23 | |||
| JP49128181B |