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选购食品接触材料认准中国GB 4806标准（GB 4806.7为塑料材料），进口产品看FDA或欧盟LFGB认证，无任何食品级标识的只能用于非食品收纳

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保鲜膜/密封袋category

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curl https://kongchang.com/api/v1/knowledge/claims/154468

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get_claim(id=154468)