??????????????????

????:???????????:???????????

??????11??23?(?????????? ??)11??23??????????,“?????????????”?????,???

???????????????????? ??????

??????????????????,???????,??????????????????????????????????????????????????????????????????????????????????????????????????????????????????30???????80??????,????,????????

????,???????????????????????????????????????????????????;???????????????,???????????«GB/T23776??????»????,??????5?????????5????

???????????????????? ??????????

??????????,??????,?????????,??(????)????,???????????,?????????????????

?,????,????,?????????????????,????????????????????????????

????????????,?????????“??”????,??,?????????????????,??????«????????»«????????????????????????????????»«????»?????????

????????????? ????

“????????????????????????,??????????????????????????”??,??,??????????,????????????????????????????,??;???????????,????????,???????

?????????,????,????“????????”??????????,?????????????????,“????????”??“????”????????39.2???????????????????????,?????????120?????,?????2??,90%????,75%????????“??”????54.76???,??????????(??????)

?????:???????????