???????????????????

????:???????:????v?

??“?????”???,??,????????,??2??5????,???

???(???????/????-??)??,?????????????????,????????????,????282.77????????????????????????,??10Mpa?

??81.52?????,??,??????????24.1???????????,??48.7%(?????????????12?),??47.9%(????????11.8????),???????????29.1%(??7.2??),???????20%;???8????,????????30%,??10????????????????????

?,??????,????220???????????????????,?????70%,????2027????????????????,?????????,????????(?????????????? ???????? ??????????????????? ?)

??:?????????