Australia's competition regulator has extended its probe into the iron ore production joint venture between BHP Billiton and Rio Tinto for a second time after flagging a series of additional issues that needed closer examination.
澳大利亚竞争监管机构第二次延长了对必和必拓(BHP Billiton)和力拓(Rio Tinto)铁矿石合资生产计划的调查，列出了一系列需要更密切考察的新问题。
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