BS 1881∶Part129∶1992 Testing concrete. Method for determination of density of partially compacted seBS 1881∶Part129∶1992 Testing concrete. Method for determination of density of partially compacted semi-dry fresh concrete
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。