BS 5573-1978 Code of practice for safety precautions in the construction of large diameter boreholesBS 5573-1978 Code of practice for safety precautions in the construction of large diameter boreholes for piling and other purposes
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。