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

????:??????????:??????500?4???

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

?:????????