??
?????????????1???????20?? ??,???????????????,???«????»(GB16171.1-2024),???????????2012????«?????????????????»(GB 161712012),??,???????,?????
?,??????????,2023?????????????????????4.9??????????,????????????????????70%??????????????????????????,?????????????????????????????????????????????4???????????????????????,????????,?,??????????????????????????????????????,?????????,????
????????,????????????????????????????50%?40%?70%?50%???,??????????????????????????,????????????????????,????????????2027????????????????1?1?????????,?????????,????????????????80%??,??? ???:????????????????
?????????
?????«??»????????????????????????????