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Mine roof supports
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Shaft lining
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Lemniscate type self-advancing roof supports
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Self-advancing roof supports in particular of high supporting capacity
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Valving block for a hydraulic mine roof supporting prop
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Method of blind hole surface finishing and boring/burnishing head therefor
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Method of carrying out major repairs of lemniscate roof supports
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Welding manipulator
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Mechanism for correcting position of roof support cap pieces
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Method of and apparatus for mounting actuators
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Upper anvil of a forging press
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Gate for a mining scraper conveyor
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Position stabilizer in particular for mine roof supports
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Self-advancing roof supports
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Two-stage hydraulic roof support for coal beds with crump hazard
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Self-advancing roof supports in particular for weak floors
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Shield-type roof supports with props
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Roof support for bouncing deposits
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Advancing system for self-advancing roof supports
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Lemniscate-type self-advancing roof supports
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