Document Type and Number:
Japanese Patent JPH0447178
Kind Code:
U
Application Number:
JP9721790U
Publication Date:
April 22, 1992
Filing Date:
September 18, 1990
Export Citation:
International Classes:
F04B33/00; (IPC1-7): F04B33/00
Domestic Patent References:
| JPS4111643Y1 |
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