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temporary electricity work
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polysulfide rubber; Thiokol
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polysulfide silane coupling agent
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polysynthetic twin
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Polytechnic School
polytene chromosome
polytene stage
polytenic chromosome
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poly (tetrafluoroethylene)
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poly (tetrafluoroethylene) (PTFE)
polytetrahydrofuran
poly (tetramethylene terephthalate)
poly (tetramethylene terephthalate); poly (butylene terephthalate) (PBT)
poly(tetraphenylethylene)
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