????????7.6???????

??????????2??????????????????9? (???? ????????????????????????????????)?????????????9???????,?2?9?7?????23???,????????????????7.6???????????????????,????????????????????????

????,??????,???,??20?????

?,???10?0????????(??),???30??????????????

??,??7??????????30??????????,????????,????,???,?????????????9????????????????30????????????????(PTWC)?????

???????,????????100?????????500?,?3????7.0??????,???2020???????1???????????????27??????????5?2???7.7???????,?????5????????????,???2018??????????7.5???????????????,??????????????4.0???????????(????????????) ??????????:???