???????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??????

????????