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US3728883A
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Support apparatus for large diameter thin-wall metal cylinders
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Anchor block assembly
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Mold for the end of concrete pipe and the like
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Gasket for bell and spigot concrete pipe
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Method of sizing bells and spigots of steel-cylinder concrete pipe
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Machine for welding reinforcements for concrete pipes and the like
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Spigot mold for concrete pipes
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Double wrapped prestressed concrete pipe
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Method of casting concrete pipes and the like
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Machine for applying coatings
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Metalworking machine
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CA591402A
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Double wrapped prestressed concrete pipe
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CA884408A
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Anchor block assembly
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