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BG52011B2
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Method for the preparation of sulphur trioxide and sulphuric acid
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BG41320A1
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Method for drying and roasting of sun- flower cores
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BG39528A1
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Method for manufacture of sulphur trioxide and sulphur acid
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BG39307A1
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Pepper sort <kapija jb ( vertus)>
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BG35771A1
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Method for obtaining wood extracts
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BG35165A1
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Control devices for the input signals of a microprocessor system in switching on and off the feeding voltage
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BG35698A1
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Method and device for drying of solutions
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BG29108A1
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Apparatus for control the feeding of semiconductor operative memory devices
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BG25177A1
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A computer
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BG25491A1
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A device for operative memory control
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BG22465A1
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Contact element for energy- and mass- exchange
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