It is a traditional sandbag replacement product, without hanging, with a buffer.
它是传统沙袋更新换代产品，不需吊挂具有缓冲性。
The Practice of Gravity Sandbag Pile Plocking Engineering For Deep Foundation Pit
深基坑重力式沙袋堆叠挡土工程的实践
The treatment of stable inflectional vertebral compress fracture of thoracolumbar spine with sandbag pillow and exercise
沙袋垫枕锻炼法治疗胸腰段稳定型屈曲压缩性骨折
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