It raises an objection against ASTM D 4172 precision value and equipment requirement, and adopts an attitude of negating to constantly import four-ball wear tester.
本文对ASTM D 4172精密度值和时设备的要求提供了异议。对继续引进磨损四球机持否定态度。
The following table is based on the guidelines of ASTM D 2855, "Standard Practice for Making Solvent-Cemented Joints with Poly Vinyl Chloride (PVC) Pipe and Fittings".
下表以美国材料实验协会ASTM D 2855“聚氯乙烯（PVC）管道和管件液状粘固剂连接标准规程”有关标准制定。
(Polyvinyl Chloride) PVC conforming to ASTM D-1784, Classification 12454-b, formerly designated Type I, Grade 1, is the most frequently specified of all thermoplastic piping materials.
(聚氯乙烯)PV C符合ASTM D- 1784，类别12454 -B标准，以前定义为类别i，等级1，是所有热塑塑料管道材料中应用最广泛的材料。
(Chlorinated Polyvinyl Chloride) CPVC conforming to ASTM D-1784, Classification 23447-B, formerly designated Type IV, Grade 1, is a resin created by the postchlorination of a PVC polymer.
（氯化聚氯乙烯）CPVC符合ASTM D-1784，类别23447-B标准，以前定义为IV类别，等级1，是由PVC聚合物进行后氯化处理后产生的一种树脂。
(Chlorinated Polyvinyl Chloride) CPVC conforming to ASTM D-1784, Classification 23447-B, formerly designated Type IV, Grade 1, is a resin created by the postchlorination of a PVC polymer.
（氯化聚氯乙烯）CPVC符合ASTM D-1784，类别23447-B标准，以前定义为IV类别，等级1，是由PVC聚合物进行后氯化处理后产生的一种树脂。
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