| 摘要 |
<p>The invention relates to a vacuum-cleaner filter bag having a filter medium comprising a first layer made of a netting, a perforated sheet or a perforated nonwoven with an air-permeability level of at least 10,000 l/(m s), and also comprising a first fibre layer which is made of man-made fibres and/or vegetable fibres and is connected to one side of the first layer.</p> |
