Exhaust valve for a bag
作者： Hiroshi Motonaka , Yoshio Shiozaki
DOI:
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摘要: A movable lid is mounted to a valve body movably in an up-and down direction toward and away from the whereby lowered be open against force of spring by pressing suction nozzle electric vacuum cleaner onto at same time exhaust bag may carried out. After exhaust, moving lid, moved upwards place its original position restoring spring, so that opened.
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