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төмрийн хүдэр нунтаглах тээрмийн үйлдвэр шигших …
ag хүдэр нунтаглах тээрмийн моторын төрлүүд. тээрмийн нунтаглах тн Mineral Processing Technology The concept of automated tunnel borers isn t new Since 2012 Rio Tinto has been working with the Centre of Excellence in Mining Innovation CEMI to build shafts and tunnels at a faster rate as part of Rio
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