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trimethylene 環丙烷; 三甲撐 環丙烷; 三甲撐 Trimethylene \Tri*meth"yl*ene\, n. (Chem.)
A gaseous hydrocarbon, {C3H6}, isomeric with propylene and obtained from it indirectly. It is the base of a series of compounds analogous to the aromatic hydrocarbons.
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