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mining methods plant

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Description: Mining Methods. The two methods used to extract trona are called “room and pillar” mining and longwall mining. Room and pillar mining means that some trona is removed, creating a “room”, and some trona is left behind to form the “pillar” that supports the mine’s tunnels. ... Sesqui Plant. Constructed in 1953, the sesqui plant was ...

Pinterest Heavy Industries Co., Ltd. China(Mainland)

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