4. Plastic and nonmetallic article shaping or treating: processes
  5. Mechanical shaping or molding to form or reform shaped article
  6. Shaping against forming surface

Perma Tubes Ltd.

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Concrete forming method

Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Patent

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Plastic lined paper form for casting concrete columns

Static molds – In situ construction engineering type or building type-mold... – Forming building structure
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