求助以下4个标准下载,一直下不到最新版。。。
1、ASTM A304-2011 Standard Specification for Carbon and Alloy Steel Bars Subject to End-Quench Hardenability Requirements[须符合端部淬火硬度要求的碳钢与合金钢棒材规格]
2、ASTM E1823-2013 Standard Terminology Relating to Fatigue and Fracture Testing[有关疲劳和断裂试验的术语]
3、ASTM F543-2013 Standard Specification and Test Methods for Metallic Medical Bone Screws[医用金属接骨螺钉规格及试验方法]
4、ASTM F1717-2013 Standard Test Methods for Spinal Implant Constructs in a Vertebrectomy Model[椎骨切除模型中脊椎植入物结构试验方法] 作者: sigh007 时间: 2013-8-11 15:36:02