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Method of producing holes in articles from composite materials
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Arrangement for making holes in articles
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Method of forming holes in articles from reinforced plastic material
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Apparatus for working cylindrical inner surfaces
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Appliance for making articles with holes
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Method of preparing sand for making mandrels
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Method of preparing sand for manufacturing holders
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Method of manufacturing pipe-shell of composite material
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Method of restoring glass-plastic shell tubes
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Tube connection method
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Tube connection method
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Method of producing jacket pipe of composition material
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Composite-material envelope connection
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Tube-envelope
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