建筑高抗渗竖井，大坝回填槽，填充混凝土等。
Build high anti-seep vertical well dam backfill cannel and fill concrete, etc...
钢管混凝土是在钢管内填充混凝土组成的一种组合材料。
Concrete filled steel tubes can be considered as a kind of composite material.
在填充混凝土之前，它们相当轻，能够很快组装而不需要大型起重机或其他重型设备。
Before they are filled with concrete they are light enough to be installed quickly, without the need for large cranes or other heavy-duty equipment.
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