??????2?28???????

??

??????????????????2??????21? (?????? ??????)???????????????21??,????2?28???????????,?????

?,???????????????????,????31.1??,??“???+????”?,?,?,????????????????????17.8????

????????????????2???28????? ?

2024??12?????????????????11???????????,????????,???????????????,??????????????????,????????????????,??????,???????????33????????????/?????????????????????????????,?13.3????????,?????,???????0.6?????/????

?????JT/T489-2019??????????1?4??1?1.5?2?3,1?????6??1?2.1?3.16?3.75?3.86?4.09,??????????,??6???????,???,??????0.17?????

?????????,?????30??????,?,???????????“???????????????????????????”????????

???????,??“?????????????”?,????,?????????2?,??2?2?????????????????????(?????),????3.32???

????????,?“?”?????????????????,????????????????,?150??????(????)

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

?????????

???????????2?28????????????

????????