Sand is an important building material.
沙子是重要的建筑材料。
Material: light mouth basin, rocks, cement, sand, etc.
材料：浅口盆、山石、水泥、沙子等。
Sand can not be added into the material without being sieved.
没有过筛子的沙子是不能入料的。
Coarse and uniform sand, as filtering material, could prevent filtering material loss and agglomeration.
粒径较粗且均匀的河沙滤料的使用，避免了滤料的大量流失和滤料结块。
In ecological restoration material area, sand-fixation material is…
环境修复材料中主要介绍了固沙植被材料。
In ecological restoration material area, sand-fixation material is…
环境修复材料中主要介绍了固沙植被材料。
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