??????????????????
12??2000??8000 32??
14??2000??8000 65??
14??2000??8000 35??
16??2000??8000 42??
16??2000??8000 32??
??????????????????
??????????b??
??????????????У??????????????????????????????????????????????????С????????????????п???????????????
??Pb??????????????????????Fo??????????????????????b= Pb/Fo ??MPa????
???????????????????
????????????????????磬????????????й?????????????ì??????????????????????????????????????????????????λ??????????????????????????????????????
????7??22?????????12*1.8*7??q370qd???????????????????
