植物鞣料
- 网络Vegetable tanning;Tanning Stuff
植物鞣料-
我国绝大部分植物鞣料资源分布在西部地区，植物单宁化工生产企业也主要集中在西部地区，全国栲胶年总产量最高曾达5万t，但近10年来徘徊在2万t。
In China , most vegetable tannin resources and tannin chemicals manufactories are distributed in the west area of the country . In recent 10 years , annual tannin extracts production in China was about 20 000 tons , although the maximum reached 50 000 tons in earlier years .