Document Type and Number:
Japanese Patent JPS52133325
Kind Code:
U
Application Number:
JP4160076U
Publication Date:
October 11, 1977
Filing Date:
April 06, 1976
Export Citation:
International Classes:
F16L21/08; F16L21/02; F24F13/02; (IPC1-7): F16L21/02; F24F13/02
Domestic Patent References:
| JPS5157621A | 1976-05-20 | |||
| JPS5157021A | 1976-05-19 |