????:1??????????:????????

2????????

3???????

4?????600?????

5????????

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

???:????