References
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- 1993 . ‘Examination of plastic welders. Examination Group II:hot gas extrusion welding (DVS 2212, Part 2)’ . Welding in the World ,
- Saechtling , H and Zebrowski , W . 1976 . “ ‘Plastics, a Handbook (third edition)’ ” . Warsaw : Publ WNT .
- 1995 . ‘Welding of thermoplastics. Welding of PE casing pipes, tubes and tubular components (DVS Guide 2207, Part 5)’ . Welding in the World ,
- ‘Welding of thermoplastics, extrusion welding, procedures, characteristics (DVS 2209, Part 1)’.
- Schraeder , W . 1973 . “ ‘Plastics ‐ forming and welding’ ” . Warsaw : Publ WNT .
- ‘Tests on joints welded in thermoplastic materials (DVS 2203, Part 1)’.
- ‘Tests on joints welded in thermoplastic materials (DVS 2203, Part 3)’.
- ‘Tests on joints welded in thermoplastic materials (DVS 2203, Part 5)’.