?? ?????????????????????????
????:1???????:????wx
2???????????
3??????
4??????????
5???150????
?????????????????????6??27??? ?,??????????????,????????????????(ISO/TC 81)??????????????,??????????????
????????????????,??“??”???????(FAO)??????,?????????30%~40%???????????????????,???????????????????????????????,????????????????????
ISO/TC 81?????????????,????????????????,????
??????????:???