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stoping development
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在完成开拓工程的矿体内,掘进一系列巷道将阶段划分为矿块,在矿块内创造行人、通风、运料、凿岩、放矿等条件的采矿准备工作。
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Guatemalan National Revolutionary Unity
Guatemalan Party of Labour
Guatemala's National Democratic Movement(1944~1954)
Guatemala's Uprising(1867~1871)
Guatemala,El Salvador and Honduras Economic Cooperation Treaty
Guatemaltecos
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guava root knot nematode
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Guayasamin Museum
Guayas River
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guayule rubber
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Guban (a small drum and a clapper)
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Gubkin, Ivan Mikhailovich
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Gu Cangwu
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Gu Changwei
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