ygs67 发表于 2018-1-21 20:15:43

ASTM F1292-17a

ASTM F1292-17a Standard Specification for Impact Attenuation of Surfacing Materials Within the Use Zone of Playground Equipment

admin 发表于 2018-1-23 19:59:03

谢谢您的分享，金币已奖励!
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