???????2?28??????
2025-02-21 22:51:2144995
???????????????????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???????(?)
???:??????