?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???(???????)

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

??

??:???????????,??????????,??????????????