Plastics piping and ducting systems - Thermoplastics pipes - Determination of ring flexibility (ISO 13968:2008); German version EN ISO 13968:2008
German title
Kunststoff-Rohrleitungs- und Schutzrohrsysteme - Rohre aus Thermoplasten - Bestimmung der Ringflexibilität (ISO 13968:2008); Deutsche Fassung EN ISO 13968:2008
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