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

????????