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Current Search ((ALL：Polytetrafluoroethylene (Ptfe)))
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2023 15 2022 44 2021 48
2020 31 2019 22 2018 28
2017 26 2016 22 2015 21
2014 14 2013 11 2012 22
2011 11 2010 11 2009 16
2008 8 2007 11 2006 8
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