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Priority to JP1988152933UpriorityCriticalpatent/JPH0717897Y2/ja
Publication of JPH0272877UpublicationCriticalpatent/JPH0272877U/ja
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Publication of JPH0717897Y2publicationCriticalpatent/JPH0717897Y2/ja
Balllshapeddvalve falling devicee sets correspondingly each opposit poles of inside type parmanent magnet and outside type parmanent magnet and makes valve fallen by magnetic induction of movement of
Balllshapeddvalve falling devicee sets correspondingly each opposit poles of inside type parmanent magnet and outside type parmanent magnet and makes valve fallen by magnetic induction of movement of