Document Type and Number:
Japanese Patent JPH0371172
Kind Code:
U
Application Number:
JP13102089U
Publication Date:
July 18, 1991
Filing Date:
November 13, 1989
Export Citation:
International Classes:
F04B53/00; F04B11/00; (IPC1-7): F04B11/00; F04B21/00
Domestic Patent References:
| JPS6295179U | 1987-06-17 | |||
| JPS58176498A | 1983-10-15 |
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