????

????????15Mp??147????22.5Mp?????12~15Mp??I? ???0.05MP??
???????????
1 ????
????????
?????????????
????????????????
2 ???
???

          ???????????????????k?????????
oxygen susceptibility test
280 kPa30 min????????????
???-?(pressure-duration limitation)
intermittent oxygen exposure
????510 min?????????????????????
?
???????
?????????????
????
??????????
 
 
1????
????????????????????( 10 m/min),????
??????????...