BS 1881∶Part207∶1992 Testing concrete. Recommendations for the assessment of concrete strength by neBS 1881∶Part207∶1992 Testing concrete. Recommendations for the assessment of concrete strength by near-to-surface tests
部份国外标准涉及版权问题,所以全部国外标准于2013年02月,全部删除!相关页面仅提供参考消息。