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

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

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

??????? ??

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

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

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

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

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

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

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

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

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

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