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Structure, mechanics, electricity, calorifics, radialization and chemicalproperties are reviewed for polyperfluoroethylene-propylene and tetrafluoroethylene perfluoroalkyl vinyl ether copolymer.

分别阐述了聚和四代烷共聚物的结构和力学热学、辐射、化学性能。

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commensalism, commensurability, commensurable, commensurate, commensuration, comment, commentary, commentary on, commentate, commentator,

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3G, 401(K), a,

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Now if you change all four of the hydrogens on the base ethylene with fluorine it becomes tetrafluoroethylene.

现在,如果改变基乙烯上所有四个氢, 它就会变成四乙烯。

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commercial artist, commercial bank, commercial credit, commercial law, commercial letter of credit, commercial loan, commercial message, commercial paper, commercialese, commercialise,

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3G, 401(K), a,
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