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[疑问求助] 国内有生产氟纤维的企业吗?比如聚四氟乙烯纤维 |
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发表于 2010-10-9 15:16:11
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发表于 2010-10-13 13:38:00
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发表于 2010-10-18 11:42:26
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发表于 2010-12-6 16:23:29
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