???????????????????
??“?”??,?????????????????,??,????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????,??,????????????????????(?????????????? ???? ??????? ?????????)
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