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

????:???51??:???????

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

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

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

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

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

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

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

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

??????? ????

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

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

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