zzcnhic 发表于 2017-7-8 00:19:45

ASTM G171 − 03 (Reapproved 2009)´2

ASTM G171 − 03 (Reapproved 2009)´2
Standard Test Method for
Scratch Hardness of Materials Using a Diamond Stylus

admin 发表于 2017-7-9 14:16:49

谢谢您的分享,金币已奖励!
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