According to the specification recently promulgated, it is required to determine fillingcriteria of incoherent coarse grain materials on the basis of their relative density.
我国近期颁布的设计规范，对土石坝的无粘性粗粒坝料的要求是以相对密度确定其填筑标准。
2
DATA EXTRACTION: Totally 43 articles of vertebroplasty in treatment of OVCF were collected, and 32 ones met the inclusion criteria, including 11 articles about the filling material of vertebroplasty.