?2???????28??????
2025-02-21 18:20:1949892
?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??(?????????????????????)
???:??????????????