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4、PS). . - . , (ISO 4287:1997Geometrical product specifications (GPS). Surface texture. Profile method. Terms, definitions and surfacetexture parameters) 4427-2:2007 . - (). 2. (ISO 4427-2:2007 Plastics piping systems Polyethylene (PE)pipes and fitting for water supply Part 2: Pipes) 4427-3:2007 . - (
5、). 3. (ISO 4427-3:2007 Plastics piping systems Polyethylene(PE) pipes and fitting for water supply Part 3: Fittings) 4437:2007 () . . (ISO 4437:2007 Buried polyethylene (PE) pipes for the supply of gaseousfuets Metric series Specifications) 8085-2:2001 , - . . . 2. - / (ISO 8085-2:2001 Polyethylene
6、fittingsfor use with polyethylene pipes for the supply of gaseous fuels Metric series Specifications Part 2:Spigot fittings for butt fusion, for socket fusion using heated tools and for use with electrofusion fittings)1 12176-12011 11414:1996 . () - / / (ISO 11414:1996 Plastics pipes andfittings Pre
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