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许多树皮的利用价值很高,如杜仲、桂皮、金鸡纳,可以制药和直接服用;桑、柳、松、梧桐等树皮,可
Many barks of high value, such as Eucommia, cinnamon, cinchina, you can take medicine and direct use; mulberry, willow, pine, Indus bark, may