Document Type and Number:
Japanese Patent JPS52139421
Kind Code:
U
Application Number:
JP4789676U
Publication Date:
October 22, 1977
Filing Date:
April 19, 1976
Export Citation:
International Classes:
F16L13/02; F16L13/00; F16L58/18; (IPC1-7): F16L13/00; F16L58/18
Domestic Patent References:
| JPS4829016A | 1973-04-17 |