Cost effective Quality Assurance programs for down and feather products are a challenge because the material is a natural product and very non-homogeneous.

花费有效的成本，以获得羽绒羽毛产品的品质保证程序，是一项有挑战的工作，因为这种原料是天然产品而且非常不均一。

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Manufactured articles filled with feather and down - Requirements for clothing - Light use.

填充有羽毛和绒毛的制品。服装的要求。轻便服装。

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The feather and down proofness is the most important quality request. It can be roughly calculated from the construction data 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。

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