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缩乙二醇醚
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缩乙二醇醚
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缩乙二醇醚
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polyethylene glycol
缩乙二醇醚
乙二醇缩合物的总称。结构通式为HO(CH2CH2O)nCH2CH2OH(n=1,2或3),常指2~4个乙二醇的缩合产品,依次称为二乙二醇醚(二甘醇)、三乙二醇醚(三甘醇)和四乙二醇醚(四甘醇),沸点分别为245.0℃、287.4℃和327.3℃。
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homotopy functor
homotopy group
homotopy group functor
homotopy group of a triad
homotopy group of CW complexes
homotopy group of spheres
homotopy identity
homotopy invariance
homotopy invariant
homotopy invariant functor
homotopy inverse
homotopy inverse mapping
homotopy length
homotopy lifting
homotopy lifting property
homotopy lifting theorem
homotopy method
homotopy monomorphism
homotopy of chain mappings
homotopy of chain maps
homotopy of mappings
homotopy of maps
homotopy operation
homotopy operator
homotopy pair
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