Document Type and Number:
Japanese Patent JPH02132192
Kind Code:
U
Application Number:
JP4147089U
Publication Date:
November 02, 1990
Filing Date:
April 07, 1989
Export Citation:
International Classes:
F16L39/04; (IPC1-7): F16L39/04
Domestic Patent References:
| JPS4981913A | 1974-08-07 |