??????2???????28?
????:2025-02-22 00:58:54 ??:????
????:???????v:????????
?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???(????????????????)
??????:????????????
????
