?? ?????????????????????????
![](https://image.chezhanri.com/2019/0708/20190708101521565.jpg)
????:1????????????:??????
2?????
3???200????
4?????
5??????
????????????????6??27???????????? ??,??????????????,?????????(ISO/TC 81)??????????????,????
?????????????????????,????????????????“??”???????(FAO)??????,????????30%~40%?????????????????,???????????????????????,?????
ISO/TC 81??????????????????,???,????????????????
???????????:?????????????????