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SK872019A3
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Method of extracting residual oil by injecting krypton 85Kr into the gaseous hanging of an oil field
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SK6197A3
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Ultrasound cleaning method for bearing balls and device for carrying out the method
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CZ512789A3
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ultra-violet radiation intensity digital indicator
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CS294189A1
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Pickup of bearings' rings ovality
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CS102189A2
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Solar radiation controlled automatic ventilating unit
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CS619188A1
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Device for metallic conductors' continuous heating-up and annealing with low-frequency current
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CS619288A1
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Connection for annealed metallic conductors' automatic temperature adjustment
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CS542988A2
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Pulsating pump
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CS650488A1
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Automatic air release valve
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CS480486A2
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Pulsation pump
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