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Gaskets for sealing joints between the bell and spigot of drain pipe
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Pipe stopper
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Machine for cutting vitrified clay pipe
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Bell and spigot tile and seal joint therefor
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Apparatus for forming tubular conduits from fibrous material
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Ceramic glazed vitrified tile and method and apparaatus for making the same
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Apparatus for making sealing means for sewer pipe joints
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Plastic interlocking sealing means for sewer pipe joints
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Pipe perforating machine
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Structural block
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Building block
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Sealing means for sewer pipe joints
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Apparatus for and methods of making sealing means for sewer pipe joints
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