ygs67 发表于 2015-11-5 16:40:12

ASTM D 589 – 97 R02

ASTM D 589 – 97 R02 Standard Test Method for Opacity of Paper (15° Diffuse Illuminant A, 89 % Reflectance Backing and Paper Backing)

admin 发表于 2015-11-6 14:41:23

谢谢您的分享,金币已奖励!
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