???,??????????????????BHP Billiton???????????????15???(14.3???)????????????????????(Turrum)??????
??????????BHP Billiton?????????????2?????????,?????????1?????????????1.1????????????????????2011??2012???????????????,??????????2015???????????????????????
??????????BHP Billiton?????????????2?????????,?????????1?????????????1.1????????????????????2011??2012???????????????,??????????2015???????????????????????