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APPARATUS FOR TRANSFORMING ROTARY MOTION INTO RECIPROCATORY ONE WITH CONTROLLABLE AMPLITUDE IN PARTICULAR FOR USE IN COLUMN-TYPE VACUUM DRIERS FOR DRYING GRAIN, PODDED PLANT SEEDS AND THE LIKE
APPARATUS FOR TRANSFORMING ROTARY MOTION INTO RECIPROCATORY ONE WITH CONTROLLABLE AMPLITUDE IN PARTICULAR FOR USE IN COLUMN-TYPE VACUUM DRIERS FOR DRYING GRAIN, PODDED PLANT SEEDS AND THE LIKE