| 摘要 |
<p>The invention relates to an air permeability apparatus (1), which comprises a test head (3) with an opening (300), a vacuum pump (9), a clamping arm (4) and an orifice disk (8) being arranged between the test head (3) and the vacuum pump (9), wherein the orifice disk (8) has a plurality of orifices. Furthermore, the orifice disk (8) is arranged vertically or inclined with respect to the opening.</p> |
