????:1??????50?:????

2????????????

3???????

4??????????

5??????

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

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

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

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

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

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

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

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

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

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

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

?????:???