Document Type and Number:
Japanese Patent JPH03103306
Kind Code:
U
Application Number:
JP1289590U
Publication Date:
October 28, 1991
Filing Date:
February 13, 1990
Export Citation:
International Classes:
E01C9/08; E03F5/04; (IPC1-7): E01C9/08; E03F5/04
Domestic Patent References:
| JPH0218508B2 | 1990-04-25 | |||
| JPH0218506B2 | 1990-04-25 |