另外可能近似测试出羽毛羽绒不穿透性的方法是：测量面料的空气渗透性。
Another possibility to check approximately the feather and down proofness is to measure the air permeability of the fabric.
羽毛/羽绒不穿透性是最重要的质量要求。这可以从面料的结构数据中粗略的计算出来。
The feather and down proofness is the most important quality request. It can be roughly calculated from the construction data of the fabric.
这是所谓的干洗，因为流体包含很少或根本没有水和不穿透纤维作为水。
It is called dry cleaning because the fluid contains little or no water and does not penetrate the fibers as water does.
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