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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
