位于真空歧管上的真空释放阀，用于在供料轮上的预定排出位置从袋子向空腔内排出颗粒材料；
A downstream vacuum relief (48) on the vacuum manifold functions to discharge particulate material from the pockets into the cavities at a predetermined discharge location on the wheel.
位于真空歧管上的真空释放阀，用于在供料轮上的预定排出位置从袋子向空腔内排出颗粒材料；
A downstream vacuum relief (48) on the vacuum manifold functions to discharge particulate material from the pockets into the cavities at a predetermined discharge location on the wheel.
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