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

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

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

?????? ??

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

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

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

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

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

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

????? ??

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

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

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