?? ?????????????????????????
![](https://image.chezhanri.com/2019/0813/20190813102955294.jpg)
????:1???????:???????
2?????95?
3?????????
4?????????????
5?????????
???6????????????????27????????????????????? ????????????,??,?????????????(ISO/TC 81)??????,???????????????????
???,??????????“?”?????????????????(FAO)?????????????,??30%~40%?????????????????????,?????????????,??????
ISO/TC 81?????????,???????????????,???????????????
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