RU1810560C
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Locked support of mine workings
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RU1800046C
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Interframe tie
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RU1770537C
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Method for forcing piledriver on shaft
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SU1717845A1
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Mine air conditioner
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RU1828924C
|
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Battery charging room for storage-battery locomotives
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RU1789447C
|
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Roller conveyer
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SU1723332A1
|
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Method of erecting monolithic concrete support
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SU1760124A1
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Method for erection of mine working frame support
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SU1671900A1
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Makeshift timbering roof for erecting circumdrift artificial pillars
|
SU1666733A1
|
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Method for vertical opening sinking
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SU1693257A1
|
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Anchor
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SU1648878A1
|
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Arrangement for fencing cable aperture of cable conveyer housing
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SU1643100A1
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Nozzle device
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SU1629685A1
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Method for construction of chambers
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