Document Type and Number:
Japanese Patent JPH03115198
Kind Code:
U
Application Number:
JP10431590U
Publication Date:
November 27, 1991
Filing Date:
October 02, 1990
Export Citation:
International Classes:
E21D9/13; E21D9/06; F04D3/02; (IPC1-7): E21D9/06; F04D3/02
Domestic Patent References:
JPS5598597A | 1980-07-26 | |||
JP57103393B |