?????????????
??????????b??
??????????????У??????????????????????????????????????????????????С????????????????п???????????????
??Pb??????????????????????Fo??????????????????????b= Pb/Fo ??MPa????
????????
??????????????????????????????????
???????????????????????????????????????????
?????????????????????????????????????????????л??????????
?????????????
10??2000??8000 52??
10??2000??8000 42??
10??2000??8000 35??
12??1800??8000 42??
12??2000??8000 42??
??????????6.0*1000*4000??q370qd?????????????????????
