???????2?28??????
?????2????????21??????? (????? ????)??????21???????????????????,??2?28??????,????
?,????,????????????????????????31.1??????,??“??????+???????”?????,??,??,??17.8??
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??(?)