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云南省油桐集中分布在牛栏江、金沙江及其支流;南盘江、元江及其支流;澜沧江流域和恕江流域。四区自然条件各异,可因地制宜发展油桐生产。
Yunnan tung is mainly distributed in Niulangjiang, Jinshajiang and its tributaries; Nanpanjiang, Yuanjiang and its tributaries; Lancang River and Shujiang watershed. The four districts have different natural conditions and can develop tung oil production according to local conditions.