??????2???????28?
2025-02-22 09:06:1241995
???????????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???(?????)
???????:??????