The book also proposes cost-effective, hazard-specific infrastructure: for example, schools that double up as cyclone shelters or roadways that double up as drains.
该书还建议提供有成本效益的、针对具体灾害的基础设施，例如可以用作飓风避难场所的学校或可以用作排水通道的道路。
The downhole oil water separation system is comprised of double fluid flow pump, cyclone separator and oil pump.
井下油水分离系统由双液流泵、旋流分离器和原油提升泵三大部分组成。
This thesis deals with the axial non symmetry of air flow in the cyclone, with change of single inlet to double inlet.
针对旋风器内气流轴不对称问题，从结构上改单进口为双进口。
This thesis deals with the axial non symmetry of air flow in the cyclone, with change of single inlet to double inlet.
针对旋风器内气流轴不对称问题，从结构上改单进口为双进口。
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