ygs67 发表于 2017-12-14 20:25:55

ASTM D6779-16

ASTM D6779-16 Standard Classification System for and Basis of Specification for Polyamide Molding and Extrusion Materials (PA)

admin 发表于 2017-12-15 17:49:56

谢谢您的分享，金币已奖励!
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