????:2024-11-24 08:36:57 ??:????
????:??????:????????
??????11????23??(??????????????? ???????????)11??????23??????,“??????”?????????,?????
????????????????????????????? ????????????????????????,??,?????????????????????????????????????????????????????????????????????????????????????????????????????30??????80????,???,???????????
???????????????,????????????????????????????;????,???????«GB/T23776????»?????????????,??????????5??????????5???
??????????????? ???????????????,??????,???????????????,??(??)????,????????????,????????????
?????????,??????,????,???????????????????,?????????????????????????
????,????“???”???????????????,?????,??????????,?????«??????»«???»«??????????»?????
????? ???????“?????????????????????????????????????????,?????????????????????”??????????,?????????????????,???????????????????,?????????????,????;??????????????????????????????,????,???
???????,???????,??????“??????”?????????????????,??,“??????”??????????“?”???????39.2???????????,????120??,???????????????????????2???,90%??????????,75%??“????”????54.76????,???????????????(????????????)
????????:?????????????