Provided is a fluorine-containing copolymer containing tetrafluoroethylene units, hexafluoropropylene units, and perfluoro(propyl vinyl ether) units, wherein the hexafluoropropylene unit content is 9.5-10.6 mass percent with respect to all of the monomer units, the perfluoro(propyl vinyl ether) unit content is 0.5-1.5 mass percent with respect to all of the monomer units, and the melt flow rate at 372 degrees centigrade is 0.8-4.4 g/10 minutes.
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