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Connecting joint structure for corrugated plastic tubing
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Corrugated tubing with integral coupling means thereon
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Modular cellular conduit assembly
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Corrugated tube coupling means
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Septic tank drainage tile
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Corrugated arched drainage tile
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Plain end sewer pipes and coupling for same
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Drain tile laying apparatus
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Perforating machine for clay drain tile
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Upender mechanism for tile machines
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Tile cutting machine
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Apparatus for handling and severing tile
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Apparatus for forming cylinders of plastic material
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Sewer pipe cutting mechanism
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CA717912A
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Method and apparatus for handling and severing tile
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CA794234A
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Plain end pipe coupling
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