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South Africas Biggest Surface Coalmining Machines

1983 The 1900 SM is mining gypsum in South Africa 1985 The 3500 SM is in operation in the USA cutting foundations in hard limestone material 1989 WIRTGEN presents prototypes of the 2600 SM for use in coal and limestone mining 1989 An optimized model of the largest surface miner built to date the 4200 SM is produced even today

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