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Apparatus for road construction
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Vibrating hand trowel
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Apparatus for emplacing concrete
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Method of emplacing concrete
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Machine for laying concrete
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Method and apparatus for resurfacing roads
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Method of forming roadbeds for railways
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Roadbed construction
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Roadbed construction for railways
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Roadbed construction
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Method of forming alpha reenforced concrete construction
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Rail support
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Rail support
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Rail-supporting structure
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CA168616A
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Railway tie
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