来自 repository.upnyk.ac.id 喜欢 0 阅读量: 107 作者: HW Widayanto,NPM : 摘要: UBPE Pongkor PT Antam (Persero) Tbk. is a state-owned company engaged in mining that uses a system of underground mining, so that the ventilation system was instrumental in the success of the mining. To ...