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poly (butylene terephthalate)
释义
poly (butylene terephthalate)
Chemistry
>高分子科学>高分子化学>释义
poly (tetramethylene terephthalate); poly (butylene terephthalate) (PBT)
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center mass system
center method
center of a ball
center of a circle
center of a conic
center of activity
center of a dynamical system
center of affinity
center of a graph
center of a group
center of a group algebra
center of a lattice
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center of an ellipse
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center of a set
center of a sphere
center of attaction
center of buoyancy
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