DIN EN ISO 13844 (2015-06)现行
Plastics piping systems - Elastomeric-sealing-ring-type socket joints for use with plastic pressure pipes - Test method for leaktightness under negative pressure, angular deflection and deformation (ISO 13844:2015); German and English version EN ISO 13844:2015
出版：German Institute for Standardisation (Deutsches Institut für Normung)
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