Document Type and Number:
Japanese Patent JPH0231591
Kind Code:
Y2
Application Number:
JP9217180U
Publication Date:
August 27, 1990
Filing Date:
June 30, 1980
Export Citation:
International Classes:
F04B39/06; F04B45/04; F04B45/047; (IPC1-7): F04B45/04; F04B39/06
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