?? ??????????????????
????:1???????????:???????????
2??????
3??????
4????????
5???sn??
??11??23?????(??????????????? ??????????)11???23???,“??”?,???
?????????? ??????,??????,??????????????????????????????????????????????????????????????????????????????????????????????????30???80??????????,?,???
??????,????????????????????????????????;??????,????«GB/T23776??»?????????,???????5??????????????????5????????????????????
????????????????? ?????????????????????,?????????,?????????????????,???????????????????????(??)????,???????????????????????????,??????????????
?????,???????,????,????????????,???????????????????????????????
????,????“????”??,???????????,??????????????????????,??«?????????????????»«???????»«??????»??????
??????????????? ??????????“?????????????????????????,????????????”?,??????????,???????????,???????????,????;?????????????????????????????????????????,?????????,???????????
????,?????,???????“????”????,??????????????,“?????????????????????????”??“???????”?????????????39.2???????????,?????????120???????????????,??????????2??????,90%????,75%???“????”????54.76????,??????????????(????)
???????:?????????