????:2024-11-24 07:55:07 ??:????
????:????????:????800
????11??23??(???????????? ??)11??????23???????????????????,“????????????????”??,???????
???????????????????????? ?????????????,?????????????,??????????????????????????????????????????????????????????????????????????????30???????80????????,??????,??
???,?????????????????????????????????;????????????,?????«GB/T23776?????????»??????????????????,????5????????????????????????5?????????????????
???????????????? ?????????????????????,????????,?????????,??(????????????)???????,????????????????,??????????????????????
???,????,?,?????????,????????????????????????????????
????,???????“??”??????????,???????????,???????????,????«???»«??????»«??????»??????????????????
?????????????? ????“??????????????????????????,?????????????”??????,????,???????,???????,?????????????;????????????????,??,????????
????,????,???????????????“??????????”???????????,??,“????????????”?????????????“???????????????????????”???????????39.2????,???????120???????,???2??????????,90%????,75%????????????????“????”????54.76?,?????????????????(??????????)
?????:?????????