Document Type and Number:
Japanese Patent JPS5730490
Kind Code:
U
Application Number:
JP10872680U
Publication Date:
February 17, 1982
Filing Date:
July 30, 1980
Export Citation:
International Classes:
F16L37/28; F16L29/00; F16L37/00; F16L37/32; (IPC1-7): F16L29/00
Domestic Patent References:
| JPS4823321B1 | 1973-07-12 | |||
| JP52069020B | ||||
| JP54144420B |