Read Edit View history 聚甲醛 jùjiǎquán polyformaldehyde Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 聚甲醛 · jùjiǎquán · polyformaldehyde 2026/03/04 聚甲醛 jùjiǎquán polyformaldehyde polyformaldehyde (CH2O)n 聚甲醛是一种具有优异性能的工程塑料。 noun created sense Mar 4, 2026, 02:25 AM