?? ?????????????????????????
![](https://image.chezhanri.com/2019/0225/20190225152304960.jpg)
????:1??????????:??????
2?????
3????????200??
4????????
5????????
???6?????????????27?? ???,??????????????????,????????????(ISO/TC 81)????????????????,???????
???????????????,??????????“?????????”??????????????????????(FAO)?,????????????????30%~40%?????????,?????????????????,??????????????????
ISO/TC 81????????,??????????????,??????????
?????????????????:???