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RU1809299C
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Optical electronic device
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RU1821789C
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Polarized-light photoelastic modulator
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RU1800261C
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Method of inspecting transparent optic articles
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RU1812424C
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Device for testing level
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RU1812422C
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Method for determination of relative angle positions of axes in two perpendicular planes
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RU1810975C
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Reversible positional electric drive
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RU1821790C
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Device for determining number of frequency-modulated signal periods within arbitrary time space
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RU1819835C
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Space conditions simulator
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RU1818531C
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Electro-optic device
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RU1820198C
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Method and device for measuring linear movement
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RU1820202C
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Method for measuring angular and linear movements
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