killer007 发表于 2017-8-28 10:22:02

ISO 7685-1998 Plastics piping systems — Glass-reinforced thermosetting plastic

ISO 7685-1998 Plastics piping systems — Glass-reinforced thermosetting plastics (GRP) pipes — Determination of initial specific ring stiffness




admin 发表于 2017-8-28 13:55:01


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