Delrin? 500AF is a medium viscosity acetal homopolymer resin containing 20% Teflon? PTFE fibers.
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ptfe fibers
聚四氟乙烯纤维
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Felt can be made of natural down fiber blended with other fibers by means of needle punching process, then have a composite of a new thermal insulation material with PTFE film.
将羽绒与其它纤维混合通过针刺工艺加工成絮毡，再与PTFE膜复合成新型保暖材料。
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