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![](https://image.chezhanri.com/2019/0807/20190807120311699.jpg)
????:1?????????:??????????
2???????????
3???????????
4??????????
5???????
??6???27??? ????????????,???????????????,????????????????(ISO/TC 81)?????????????,?????????????????
?,?????????????????????“??????????????”???(FAO)??????????,??????????????30%~40%????????????????????????????,????????????????????,?????????????
ISO/TC 81????????,????????????????,????
???:???????