???????????????????????
6??1800??8000 32??
6??1800??8000 98??
6??1800??8000 70??
4??1500??6000 21??
5??1800??8000 32??
???????????????????????
??????????b??
??????????????У??????????????????????????????????????????????????С????????????????п???????????????
??Pb??????????????????????Fo??????????????????????b= Pb/Fo ??MPa????
????????????????????????
?????淽?棬???????棬????????????????????????????????????????10??????????????????????210??????????????л????????????????28?????1378????????????????????????棬?г?????????????г?????????????????????????????棬?????????????????????????????????????????????????3400-3500?/??????????????????????????????????????????????????????????????·?????
6??25???????40*1.8*7??q420q?????????????????????
