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Year of Publication 07.09.2016
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Integral inlaying type ventilation steel die
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Frame location type draw shaft ore drawing gate foundation bolt device
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Year of Publication 10.09.2014
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Ore drawing grate sieve for draw shaft
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Rail rotary table for underground transportation
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Year of Publication 13.02.2013
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Grouting pipe for underground water plugging
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Year of Publication 13.02.2013
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